# Punch File

Below is a list of the different types of Punch files available:

## Acceleration

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the ACCELERATION I/O Options Entry and Subcase Information Entry.

The Acceleration output format and information in the PCH file varies based on:
1. Solution Sequence
2. Requested corresponding output parameters

This document contains details about PCH output for various solution sequences, with corresponding output parameters (wherever applicable). Example: PCH output from actual models are illustrated with information about the various sections of the output.

Similar PCH format documents are available for all supported output variables (STRESS, STRAIN, and so on). See the .pch file for a full list of supported output variables in conjunction with PCH output format, along with a link to each detailed PCH format documents.

### General Acceleration PCH Format (File Specification)

The information in the PCH file varies depending on the requested output; however, some parts of the PCH file are common and the syntax is similar across most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported Acceleration output parameters for Frequency Response Analysis.

#### General (Default)

For Acceleration results with the default settings, for example if ACCELERATION(PUNCH)=ALL/SID is used, the output is presented in the following format. For Frequency Response Analysis, the Acceleration results are output for each loading frequency.

#### Sorted Output

The results can be sorted based on Frequency using the SORT1 (default) argument, as shown in General (Default). For Frequency Response Analysis, if grid SET is not specified, SORT1 is used, otherwise, SORT2 is used as default.

#### Output Form (form)

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in Sorted Output).

#### Filtered Output (peakoutput)

Output can be filtered based on the loading frequencies at which specified result peaks occur. This can be controlled on the PEAKOUT Bulk Data Entry. The format for the PCH output is the same as those shown in previous sections. The output is just a smaller subset of loading frequencies.

#### Normal Acceleration (type)

Normal Acceleration results for grid points on the surface of shell and solid elements are output. The NORMAL argument can be used to generate this output. Currently NORMAL Acceleration results are not available in the PCH file.

The order of information printed in the .pch file immediately following the file specification section is:
Number
Result Type
1
Grid ID at which MPCFORCE is requested
2
The character “G” identifying that the results are for a particular grid
3
Real part of the Translational MPCFORCE along X
4
Real part of the Translational MPCFORCE along Y
5
Real part of the Translational MPCFORCE along Z
6
Real part of the Rotational MPCFORCE (MPC Moment) along X
7
Real part of the Rotational MPCFORCE (MPC Moment) along Y
8
Real part of the Rotational MPCFORCE (MPC Moment) along Z
9
Imaginary part of the Translational MPCFORCE along X
10
Imaginary part of the Translational MPCFORCE along Y
11
Imaginary part of the Translational MPCFORCE along Z
12
Imaginary part of the Rotational MPCFORCE (MPC Moment) along X
13
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Y
14
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Z

### Random Response Analysis

The supported Acceleration output parameters for Random Response Analysis.

#### General (Default) or Random Output (random)

For Acceleration results with the default settings, for example if ACCELERATION(PUNCH)=ALL/SID is used, the output is presented in the following format. For Random Response Analysis, the Acceleration results are basically Power Spectral Density values for each loading frequency. Only PSD output (via PSDF argument) is output to the PCH file. RMS (cumulative) or RMS (Over frequencies) are not printed to the PCH file. The RMS results are only printed to the H3D file.

### Linear Transient Analysis

The supported Acceleration output parameters for Linear Transient Analysis.

#### General (Default)

For Acceleration results with the default settings, for example if ACCELERATION(PUNCH)=ALL/SID is used, the output is presented in the following format. For Transient Response Analysis, the PCH file contains the Acceleration values in SORT2 format by default, that is, the results for each Grid are grouped together.

#### Sorted Output

The results can be sorted based on Grid points using the SORT2 (default) argument, as shown in General (Default). Transient Response Results are different when compared to the Frequency Response Results as the default sorting for Transient Results is SORT2.

### Linear Transient Analysis by Fourier Transformation

The supported Acceleration output parameters for Linear Transient Analysis by Fourier Transformation.

#### General (Default)

For Acceleration results with the default settings, for example if ACCELERATION(PUNCH)=ALL/SID is used, the output is presented in the same format as Linear Transient Analysis.

## Displacement

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the DISPLACEMENT I/O Options Entry and Subcase Information Entry.

The Displacement output format and information in the PCH file varies based on:
1. Solution Sequence
2. Requested corresponding output parameters

This document contains details about PCH output for various solution sequences, with corresponding output parameters (wherever applicable). Example: PCH output from actual models are illustrated with information about the various sections of the output.

Similar PCH format documents are available for all supported output variables (STRESS, STRAIN, and so on). See the .pch file for a full list of supported output variables in conjunction with PCH output format, along with a link to each detailed PCH format documents.

### General Displacement PCH Format (File Specification)

The information in the PCH file varies depending on the requested output, however, some parts of the PCH file are common and the syntax is similar across most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported Displacement output parameters for Frequency Response Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Frequency Response Analysis, the Displacement results are output for each loading frequency.

#### Sorted Output

The results can be sorted based on Frequency using the SORT1 (default) argument, as shown in General (Default). For Frequency Response Analysis, if grid SET is not specified, SORT1 is used, otherwise, SORT2 is used as default.

#### Output Form (form)

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in Sorted Output).

#### Filtered Output (peakoutput)

Output can be filtered based on the loading frequencies at which specified result peaks occur. This can be controlled on the PEAKOUT Bulk Data Entry. The format for the PCH output is the same as those shown in previous sections. The output is just a smaller subset of loading frequencies.

#### Modal Output (modal)

Modal displacements can be output for any Modal Frequency Response Subcase with the MODAL argument. The modal displacements will be output, however, corresponding FRF displacements are not output in conjunction. Therefore, either FRF displacements are output (without MODAL argument) or Modal displacements are output (with MODAL argument).

#### Normal Displacement (type)

Normal displacement results for grid points on the surface of shell and solid elements are output. The NORMAL argument can be used to generate this output. Currently NORMAL displacement results are not available in the PCH file.

### Random Response Analysis

The supported Displacement output parameters for Random Response Analysis.

#### General (Default) or Random Output (random)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Random Response Analysis, the Displacement results are basically Power Spectral Density values for each loading frequency. PSD output (via PSDF argument) is output to the PCH file. RMS (cumulative) is printed to the to the PCH file. However, RMS results up to a particular frequency are not printed to the PCH file.

### Linear Transient Analysis

The supported Displacement output parameters for Linear Transient Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Transient Response Analysis, the PCH file contains the Displacement values in SORT2 format by default, that is, the results for each Grid are grouped together.

#### Sorted Output

The results can be sorted based on Grid points using the SORT2 (default) argument, as shown in General (Default). Transient Response Results are different when compared to the Frequency Response Results as the default sorting for Transient Results is SORT2.

#### Modal Output (modal)

Modal displacements can be output for any Modal Transient Response Subcase with the MODAL argument. The modal displacements will be output; however, corresponding Transient Analysis displacements are not output in conjunction. Therefore, either Transient Analysis displacements are output (without MODAL argument) or Modal displacements are output (with MODAL argument).

The format of the output in the Punch file varies depending on the sorting (SORT1/SORT2) option applied.

### Linear Transient Analysis by Fourier Transformation

The supported Displacement output parameters for Linear Transient Analysis by Fourier Transformation.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the same format as Linear Transient Analysis.

### Linear and Nonlinear Static Analysis

The supported Displacement output parameters for Linear Static Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format.

### Linear Buckling Analysis

The supported Displacement output parameters for Linear Buckling Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Linear Buckling Analysis, the Eigenvectors are output. The Eigenvalue and Mode number is also printed at the top of each Eigenvector block.

### Normal Modes Analysis

The supported Displacement output parameters for Normal Modes Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Normal Modes Analysis, the Eigenvectors are output. The Eigenvalue and Mode number is also printed at the top of each Eigenvector block.

### Complex Eigenvalue Analysis

The supported Displacement output parameters for Complex Eigenvalue Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Complex Eigenvalue Analysis, the Displacement results are basically Complex Eigen Modes along with the corresponding Complex Eigenvalues.

#### Output Form (form)

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in General (Default)).

#### Unstable Mode Output (complex eigenvalue analysis)

The unstable modes (only) of a complex eigenvalue analysis can be output using the UNSTABLE argument.
Note: The other modes are not output.

### Response Spectrum Analysis

The supported Displacement output parameters for Response Spectrum Analysis.

#### General (Default)

For Displacement results with the default settings, for example if DISPLACEMENT(PUNCH)=ALL/SID is used, the output is presented in the following format. For Response Spectrum Analysis, the PCH file contains the Modal Participation Factors, Modal Participation Factor Ratios, Modal Effective Mass, and the peak Displacement values are Power Spectral Density values for each loading frequency. The H3D file only contains the Peak Displacement values.

## Stress

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the STRESS I/O Options Entry and Subcase Information Entry.

The Stress output format and information in the PCH file vary based on:
1. Solution Sequence
2. Requested corresponding output parameters

This document contains details about PCH output for various solution sequences, with corresponding output parameters (wherever applicable). Example: PCH output from actual models are illustrated with information about the various sections of the output.

Similar PCH format documents are available for all supported output variables (STRAIN, ESE, and so on). See the .pch file for a full list of supported output variables in conjunction with PCH output format, along with a link to each detailed PCH format documents.

### General Stress PCH Format (File Specification)

The information in the PCH file varies depending on the requested output, however, some parts of the PCH file are common and the syntax is similar to most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported Stress output parameters for Frequency Response Analysis.

For Stress results, output is presented in the following format. The format for elemental results such as stress is dependent on the element type. Therefore, the following sections illustrate the format and stress entities for each element type.

#### 1D Elements

Frequency response stress results may be output in Real/Imaginary or Magnitude/Phase formats via the REAL/IMAG or PHASE arguments, respectively on the STRESS entry.

Frequency response stress results may be output in either SORT1 or SORT2 formats. The following information is presented in SORT1 format (which is the default for Frequency Response analysis).

#### CBEAM

The order of information printed in the .pch file is:
Number
Result Type
1
CBEAM Element ID
2
CBEAM Grid ID
3
Station/Location Distance along the beam where stress is output
4
Real Part (or Magnitude) of Longitudinal Stress at Point C
5
Real Part (or Magnitude) of Longitudinal Stress at Point D
6
Real Part (or Magnitude) of Longitudinal Stress at Point E
7
Real Part (or Magnitude) of Longitudinal Stress at Point F
8
Imaginary Part (or Phase) of Longitudinal Stress at Point C
9
Imaginary Part (or Phase) of Longitudinal Stress at Point D
10
Imaginary Part (or Phase) of Longitudinal Stress at Point E
11
Imaginary Part (or Phase) of Longitudinal Stress at Point F
12
The above result block from entry 2 to 11 is repeated for all intermediate stations and the other end of the beam. Currently intermediate stations are not supported and are output as 0.0.

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBEAM, the stress recovery points are user-defined on the PBEAM Bulk Data Entry. For PBEAML, the stress recovery points are automatically defined by the beam type and dimensions. Stress recovery at intermediate stations along the CBEAM element is currently not supported.

#### CBAR

The order of information printed in the .pch file is:
Number
Results Type
1
CBAR Element ID
2
Real Part (or Magnitude) of Bending Stress at Point C of End A
3
Real Part (or Magnitude) of Bending Stress at Point D of End A
4
Real Part (or Magnitude) of Bending Stress at Point E of End A
5
Real Part (or Magnitude) of Bending Stress at Point F of End A
6
Real Part (or Magnitude) of Axial Stress
7
Imaginary Part (or Phase) of Bending Stress at Point C of End A
8
Imaginary Part (or Phase) of Bending Stress at Point D of End A
9
Imaginary Part (or Phase) of Bending Stress at Point E of End A
10
Imaginary Part (or Phase) of Bending Stress at Point F of End A
11
Imaginary Part (or Phase) of Axial Stress
12
Real Part (or Magnitude) of Bending Stress at Point C of End B
13
Real Part (or Magnitude) of Bending Stress at Point D of End B
14
Real Part (or Magnitude) of Bending Stress at Point E of End B
15
Real Part (or Magnitude) of Bending Stress at Point F of End B
16
Imaginary Part (or Phase) of Bending Stress at Point C of End B
17
Imaginary Part (or Phase) of Bending Stress at Point D of End B
18
Imaginary Part (or Phase) of Bending Stress at Point E of End B
19
Imaginary Part (or Phase) of Bending Stress at Point F of End B

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBAR, the stress recovery points are user-defined on the PBAR Bulk Data Entry. For PBARL, the stress recovery points are automatically defined by the beam type and dimensions.

#### CELAS

The order of information printed in the .pch file is:
Number
Results Type
1
CELAS Element ID
2
Real Part (or Magnitude) of Stress along component listed on CELAS entry
3
Imaginary Part (or Phase) of Stress along component listed on CELAS entry

#### CROD

The order of information printed in the .pch file is:
Number
Results Type
1
CROD Element ID
2
Real Part (or Magnitude) of Axial Stress
3
Imaginary Part (or Phase) of Axial Stress
4
Real Part (or Magnitude) of Torsional Stress
5
Imaginary Part (or Phase) of Torsional Stress

CTUBE element results are listed as CROD results in the .pch file.

#### CWELD

CWELD results are not supported in Frequency Response Analysis in the PCH file.

#### CBUSH

The order of information printed in the .pch file is:
Number
Results Type
1
CBUSH Element ID
2
Real Part (or Magnitude) of Stress Translational X
3
Real Part (or Magnitude) of Stress Translational Y
4
Real Part (or Magnitude) of Stress Translational Z
5
Real Part (or Magnitude) of Stress Moment X
6
Real Part (or Magnitude) of Stress Moment Y
7
Real Part (or Magnitude) of Stress Moment Z
2
Imaginary Part (or Phase) of Stress Translational X
3
Imaginary Part (or Phase) of Stress Translational Y
4
Imaginary Part (or Phase) of Stress Translational Z
5
Imaginary Part (or Phase) of Stress Moment X
6
Imaginary Part (or Phase) of Stress Moment Y
7
Imaginary Part (or Phase) of Stress Moment Z

Element Stress results are not output for CFAST elements in the .pch file.

#### 2D Elements

The type of stress information printed for 2D elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common. However, the results format and information depends on the results location requested on the STRESS entry. Frequency response stress results may be output in Real/Imaginary or Magnitude/Phase formats via the REAL/IMAG or PHASE arguments, respectively on the STRESS entry.

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Results Type
1
2D Element ID
2
Fiber Distance (at location Z1 defined on PSHELL)
3
Real Part (or Magnitude) of Normal XX Stress (at location Z1 defined on PSHELL)
4
Imaginary Part (or Phase) of Normal XX Stress (at location Z1 defined on PSHELL)
5
Real Part (or Magnitude) of Normal YY Stress (at location Z1 defined on PSHELL)
6
Imaginary Part (or Phase) of Normal YY Stress (at location Z1 defined on PSHELL)
7
Real Part (or Magnitude) of Shear XY Stress (at location Z1 defined on PSHELL)
8
Imaginary Part (or Phase) of Shear XY Stress (at location Z1 defined on PSHELL)
9
Fiber Distance (at location Z2 defined on PSHELL)
10
Real Part (or Magnitude) of Normal XX Stress (at location Z2 defined on PSHELL)
11
Imaginary Part (or Phase) of Normal XX Stress (at location Z2 defined on PSHELL)
12
Real Part (or Magnitude) of Normal YY Stress (at location Z2 defined on PSHELL)
13
Imaginary Part (or Phase) of Normal YY Stress (at location Z2 defined on PSHELL)
14
Real Part (or Magnitude) of Shear XY Stress (at location Z2 defined on PSHELL)
15
Imaginary Part (or Phase) of Shear XY Stress (at location Z2 defined on PSHELL)
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Results Type
1
2D Element ID
2
CEN/ flag identifying that the current result block displays element center results.
3
An Integer listing the number of grid points of the element at which results are output in the subsequent block after the central results.
4
Fiber Distance (at location Z1 defined on PSHELL)
5
Real Part (or Magnitude) of Normal XX Stress (at location Z1 defined on PSHELL)
6
Imaginary Part (or Phase) of Normal XX Stress (at location Z1 defined on PSHELL)
7
Real Part (or Magnitude) of Normal YY Stress (at location Z1 defined on PSHELL)
8
Imaginary Part (or Phase) of Normal YY Stress (at location Z1 defined on PSHELL)
9
Real Part (or Magnitude) of Shear XY Stress (at location Z1 defined on PSHELL)
10
Imaginary Part (or Phase) of Shear XY Stress (at location Z1 defined on PSHELL)
11
Fiber Distance (at location Z2 defined on PSHELL)
12
Real Part (or Magnitude) of Normal XX Stress (at location Z2 defined on PSHELL)
13
Imaginary Part (or Phase) of Normal XX Stress (at location Z2 defined on PSHELL)
14
Real Part (or Magnitude) of Normal YY Stress (at location Z2 defined on PSHELL)
15
Imaginary Part (or Phase) of Normal YY Stress (at location Z2 defined on PSHELL)
16
Real Part (or Magnitude) of Shear XY Stress (at location Z2 defined on PSHELL)
17
Imaginary Part (or Phase) of Shear XY Stress (at location Z2 defined on PSHELL)
18
Grid Point ID at which stress results are output in the subsequent block.
19
Fiber Distance (at location Z1 defined on PSHELL)
20
Real Part (or Magnitude) of Normal XX Stress (at location Z1 defined on PSHELL)
21
Imaginary Part (or Phase) of Normal XX Stress (at location Z1 defined on PSHELL)
22
Real Part (or Magnitude) of Normal YY Stress (at location Z1 defined on PSHELL)
23
Imaginary Part (or Phase) of Normal YY Stress (at location Z1 defined on PSHELL)
24
Real Part (or Magnitude) of Shear XY Stress (at location Z1 defined on PSHELL)
25
Imaginary Part (or Phase) of Shear XY Stress (at location Z1 defined on PSHELL)
26
Fiber Distance (at location Z2 defined on PSHELL)
27
Real Part (or Magnitude) of Normal XX Stress (at location Z2 defined on PSHELL)
28
Imaginary Part (or Phase) of Normal XX Stress (at location Z2 defined on PSHELL)
29
Real Part (or Magnitude) of Normal YY Stress (at location Z2 defined on PSHELL)
30
Imaginary Part (or Phase) of Normal YY Stress (at location Z2 defined on PSHELL)
31
Real Part (or Magnitude) of Shear XY Stress (at location Z2 defined on PSHELL)
32
Imaginary Part (or Phase) of Shear XY Stress (at location Z2 defined on PSHELL)
33
Items 18 to 32 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

#### 3D Elements

The type and formatting of stress information printed for 3D elements (CHEXA, CTETRA, and CPENTA) is common. The order of information printed in the .pch file is:

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Results Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested).
5
CENTER flag indicating that element center results are output in the following block.
6
Real Part (or Magnitude) of Normal XX Stress
7
Real Part (or Magnitude) of Normal YY Stress
8
Real Part (or Magnitude) of Normal ZZ Stress
9
Real Part (or Magnitude) of Shear XY Stress
10
Real Part (or Magnitude) of Shear YZ Stress
11
Real Part (or Magnitude) of Shear ZX Stress
12
Imaginary Part (or Phase) of Normal XX Stress
13
Imaginary Part (or Phase) of Normal YY Stress
14
Imaginary Part (or Phase) of Normal ZZ Stress
15
Imaginary Part (or Phase) of Shear XY Stress
16
Imaginary Part (or Phase) of Shear YZ Stress
17
Imaginary Part (or Phase) of Shear ZX Stress
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Results Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested).
5
CENTER flag indicating that element center results are output in the following block.
6
Real Part (or Magnitude) of Normal XX Stress
7
Real Part (or Magnitude) of Normal YY Stress
8
Real Part (or Magnitude) of Normal ZZ Stress
9
Real Part (or Magnitude) of Shear XY Stress
10
Real Part (or Magnitude) of Shear YZ Stress
11
Real Part (or Magnitude) of Shear ZX Stress
12
Imaginary Part (or Phase) of Normal XX Stress
13
Imaginary Part (or Phase) of Normal YY Stress
14
Imaginary Part (or Phase) of Normal ZZ Stress
15
Imaginary Part (or Phase) of Shear XY Stress
16
Imaginary Part (or Phase) of Shear YZ Stress
17
Imaginary Part (or Phase) of Shear ZX Stress
18
Grid ID for which the subsequent result block is output.
19
Real Part (or Magnitude) of Normal XX Stress
20
Real Part (or Magnitude) of Normal YY Stress
21
Real Part (or Magnitude) of Normal ZZ Stress
22
Real Part (or Magnitude) of Shear XY Stress
23
Real Part (or Magnitude) of Shear YZ Stress
24
Real Part (or Magnitude) of Shear ZX Stress
25
Imaginary Part (or Phase) of Normal XX Stress
26
Imaginary Part (or Phase) of Normal YY Stress
27
Imaginary Part (or Phase) of Normal ZZ Stress
28
Imaginary Part (or Phase) of Shear XY Stress
29
Imaginary Part (or Phase) of Shear YZ Stress
30
Imaginary Part (or Phase) of Shear ZX Stress
31
Items 18 to 30 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

### Random Response Analysis

The supported Stress output parameters for Random Response Analysis.

#### General (Default) or Random Output (random)

For Stress results with the default settings, for example if STRESS(PUNCH)=ALL/SID is used, the output is presented in the following format.

For Random Response Analysis, the Stress results are basically Power Spectral Density Stress values for each loading. PSD output (via PSDF argument) and RMS total over all frequencies are output to the PCH file. RMS cumulative up to a particular frequency are not printed to the PCH file.

##### CBEAM
The order of information printed in the .pch file is:
Number
Result Type
1
CBEAM Element ID
2
CBEAM Grid ID
3
Station/Location Distance along the beam where stress is output
4
Longitudinal PSDF/RMS-over-Frequencies Stress at Point C
5
Longitudinal PSDF/RMS-over-Frequencies Stress at Point D
6
Longitudinal PSDF/RMS-over-Frequencies Stress at Point E
7
Longitudinal PSDF/RMS-over-Frequencies Stress at Point F
8
The above result block is repeated for all intermediate stations and the other end of the beam. Currently intermediate stations are not supported and are output as 0.0.

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBEAM, the stress recovery points are user-defined on the PBEAM Bulk Data Entry. For PBEAML, the stress recovery points are automatically defined by the beam type and dimensions. Stress recovery at intermediate stations along the CBEAM element is currently not supported.

##### CBAR
The order of information printed in the .pch file is:
Number
Result Type
1
CBAR Element ID
2
Bending PSDF/RMS-over-Frequencies Stress at Point C of End A
3
Bending PSDF/RMS-over-Frequencies Stress at Point D of End A
4
Bending PSDF/RMS-over-Frequencies Stress at Point E of End A
5
Bending PSDF/RMS-over-Frequencies Stress at Point F of End A
6
Axial Stress
10
Bending PSDF/RMS-over-Frequencies Stress at Point C of End B
11
Bending PSDF/RMS-over-Frequencies Stress at Point D of End B
12
Bending PSDF/RMS-over-Frequencies Stress at Point E of End B
13
Bending PSDF/RMS-over-Frequencies Stress at Point F of End B

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBAR, the stress recovery points are user-defined on the PBAR Bulk Data Entry. For PBARL, the stress recovery points are automatically defined by the beam type and dimensions.

Element PSDF Stress results are not output for CFAST, CWELD, CBUSH, CROD, and CELAS elements in the .pch file.

##### 2D Elements

The type of stress information printed for 2D elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common. However, the results format and information depends on the results location requested on the STRESS entry.

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
2D Element ID
2
Fiber Distance (at location Z1 defined on PSHELL)
3
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
4
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
5
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
6
Fiber Distance (at location Z2 defined on PSHELL)
7
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
8
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
9
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
2D Element ID
2
CEN/ flag identifying that the current result block displays element center results.
3
An Integer listing the number of grid points of the element at which results are output in the subsequent block after the central results.
4
Fiber Distance (at location Z1 defined on PSHELL)
5
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
6
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
7
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
8
Fiber Distance (at location Z2 defined on PSHELL)
9
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
10
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
11
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
12
Grid Point ID at which stress results are output in the subsequent bloc
13
Fiber Distance (at location Z1 defined on PSHELL)
14
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
15
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
16
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z1 defined on PSHELL)
17
Fiber Distance (at location Z2 defined on PSHELL)
18
Normal XX PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
19
Normal YY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
20
Shear XY PSDF/RMS-over-Frequencies Stress (at location Z2 defined on PSHELL)
21
Items 12 to 20 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

##### 3D Elements

The type and formatting of stress information printed for 3D elements (CHEXA, CTETRA, and CPENTA) is common. The order of information printed in the .pch file is:

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested)
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX PSDF/RMS-over-Frequencies Stress
7
Normal YY PSDF/RMS-over-Frequencies Stress
8
Normal ZZ PSDF/RMS-over-Frequencies Stress
9
Shear XY PSDF/RMS-over-Frequencies Stress
10
Shear YZ PSDF/RMS-over-Frequencies Stress
11
Shear ZX PSDF/RMS-over-Frequencies Stress
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested)
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX PSDF/RMS-over-Frequencies Stress
7
Normal YY PSDF/RMS-over-Frequencies Stress
8
Normal ZZ PSDF/RMS-over-Frequencies Stress
9
Shear XY PSDF/RMS-over-Frequencies Stress
10
Shear YZ PSDF/RMS-over-Frequencies Stress
11
Shear ZX PSDF/RMS-over-Frequencies Stress
12
Grid ID indicating that stress results in the subsequent block are output at the specified Grid.
13
Normal XX PSDF/RMS-over-Frequencies Stress
14
Normal YY PSDF/RMS-over-Frequencies Stress
15
Normal ZZ PSDF/RMS-over-Frequencies Stress
16
Shear XY PSDF/RMS-over-Frequencies Stress
17
Shear YZ PSDF/RMS-over-Frequencies Stress
18
Shear ZX PSDF/RMS-over-Frequencies Stress
19
Items 12 to 18 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

### Linear Transient Response Analysis

The supported Stress output parameters for Linear Transient Response Analysis.

For Stress results output is presented in the following format. The format for elemental results such as stress is dependent on the element type. Therefore, the following sections illustrate the format and stress entities for each element type.

#### 1D Elements

Linear Transient response stress results may be output in either SORT1 or SORT2 formats. The following information is presented in SORT2 format (which is the default for Transient analysis).

#### CBEAM

The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
CBEAM Grid ID
3
Station/Location Distance along the beam where stress is output
4
Longitudinal Stress at Point C
5
Longitudinal Stress at Point D
6
Longitudinal Stress at Point E
7
Longitudinal Stress at Point F
8
Maximum Stress
9
Minimum Stress
10
Safety Margin in Tension
11
Safety Margin in Compression
12
The above result block is repeated for all intermediate stations and the other end of the beam. Currently intermediate stations are not supported and are output as 0.0.

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBEAM, the stress recovery points are user-defined on the PBEAM Bulk Data Entry. For PBEAML, the stress recovery points are automatically defined by the beam type and dimensions. Stress recovery at intermediate stations along the CBEAM element is currently not supported.

#### CBAR

The order of information printed in the .pch file is:
Number
Result Type
1
Time Step
2
Bending Stress at Point C of End A
3
Bending Stress at Point D of End A
4
Bending Stress at Point E of End A
5
Bending Stress at Point F of End A
6
Axial Stress
7
Maximum Stress at End A
8
Minimum Stress at End A
9
Safety Margin in Tension
10
Bending Stress at Point C of End B
11
Bending Stress at Point D of End B
12
Bending Stress at Point E of End B
13
Bending Stress at Point F of End B
14
Maximum Stress at End B
15
Minimum Stress at End B
16
Safety Margin in Compression

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBAR, the stress recovery points are user-defined on the PBAR Bulk Data Entry. For PBARL, the stress recovery points are automatically defined by the beam type and dimensions.

#### CELAS

The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
Stress along component listed on CELAS entry

#### CROD

The order of information printed in the .pch file is:
Number
Result Type
1
Time Step
2
Axial Stress
3
Axial Stress Safety Margin
4
Torsional Stress
5
Torsional Stress Safety Margin

CTUBE element results are listed as CROD results in the .pch file.

#### CBUSH

The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
Stress Translational X
3
Stress Translational Y
4
Stress Translational Z
5
Stress Moment X
6
Stress Moment Y
7
Stress Moment Z

Element Stress results are not output for CFAST elements in the .pch file.

#### 2D Elements

The type of stress information printed for 2D elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common. However, the results format and information depends on the results location requested on the STRESS entry.

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
Fiber Distance (at location Z1 defined on PSHELL)
3
Normal XX Stress (at location Z1 defined on PSHELL)
4
Normal YY Stress (at location Z1 defined on PSHELL)
5
Shear XY Stress (at location Z1 defined on PSHELL)
6
Principal Stress Angle (at location Z1 defined on PSHELL)
7
Major Principal Stress (at location Z1 defined on PSHELL)
8
Minor Principal Stress (at location Z1 defined on PSHELL)
9
von Mises Stress (at location Z1 defined on PSHELL)
10
Fiber Distance (at location Z2 defined on PSHELL)
11
Normal XX Stress (at location Z2 defined on PSHELL)
12
Normal YY Stress (at location Z2 defined on PSHELL)
13
Shear XY Stress (at location Z2 defined on PSHELL)
14
Principal Stress Angle (at location Z2 defined on PSHELL)
15
Major Principal Stress (at location Z2 defined on PSHELL)
16
Minor Principal Stress (at location Z2 defined on PSHELL)
17
von Mises Stress (at location Z2 defined on PSHELL)
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
CEN/ flag identifying that the current result block displays element center results.
3
An Integer listing the number of grid points of the element at which results are output in the subsequent block after the central results.
4
Fiber Distance (at location Z1 defined on PSHELL)
5
Normal XX Stress (at location Z1 defined on PSHELL)
6
Normal YY Stress (at location Z1 defined on PSHELL)
7
Shear XY Stress (at location Z1 defined on PSHELL)
8
Principal Stress Angle (at location Z1 defined on PSHELL)
9
Major Principal Stress (at location Z1 defined on PSHELL)
10
Minor Principal Stress (at location Z1 defined on PSHELL)
11
von Mises Stress (at location Z1 defined on PSHELL)
12
Fiber Distance (at location Z2 defined on PSHELL)
13
Normal XX Stress (at location Z2 defined on PSHELL)
14
Normal YY Stress (at location Z2 defined on PSHELL)
15
Shear XY Stress (at location Z2 defined on PSHELL)
16
Principal Stress Angle (at location Z2 defined on PSHELL)
17
Major Principal Stress (at location Z2 defined on PSHELL)
18
Minor Principal Stress (at location Z2 defined on PSHELL)
19
von Mises Stress (at location Z2 defined on PSHELL)
20
Grid Point ID at which stress results are output in the subsequent block.
21
Fiber Distance (at location Z1 defined on PSHELL)
22
Normal XX Stress (at location Z1 defined on PSHELL)
23
Normal YY Stress (at location Z1 defined on PSHELL)
24
Shear XY Stress (at location Z1 defined on PSHELL)
25
Principal Stress Angle (at location Z1 defined on PSHELL)
26
Major Principal Stress (at location Z1 defined on PSHELL)
27
Minor Principal Stress (at location Z1 defined on PSHELL)
28
von Mises Stress (at location Z1 defined on PSHELL)
29
Fiber Distance (at location Z2 defined on PSHELL)
30
Normal XX Stress (at location Z2 defined on PSHELL)
31
Normal YY Stress (at location Z2 defined on PSHELL)
32
Shear XY Stress (at location Z2 defined on PSHELL)
33
Principal Stress Angle (at location Z2 defined on PSHELL)
34
Major Principal Stress (at location Z2 defined on PSHELL)
35
Minor Principal Stress (at location Z2 defined on PSHELL)
36
von Mises Stress (at location Z2 defined on PSHELL)
37
Items 20 to 36 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

#### 3D Elements

The type and formatting of stress information printed for 3D elements (CHEXA, CTETRA, and CPENTA) is common. The order of information printed in the .pch file is:

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested)
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX Stress
7
Shear XY Stress
8
Major Principal Stress
9
Major Principal X Cosine
10
Mid Principal X Cosine
11
Minor Principal X Cosine
12
Mean Stress
13
von Mises Stress
14
Normal YY Stress
15
Shear YZ Stress
16
Mid Principal Stress
17
Major Principal Y Cosine
18
Mid Principal Y Cosine
19
Minor Principal Y Cosine
20
Normal ZZ Stress
21
Shear XZ Stress
22
Minor Principal Stress
23
Major Principal Z Cosine
24
Mid Principal Z Cosine
25
Minor Principal Z Cosine
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
Time step
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested)
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX Stress
7
Shear XY Stress
8
Major Principal Stress
9
Major Principal X Cosine
10
Mid Principal X Cosine
11
Minor Principal X Cosine
12
Mean Stress
13
von Mises Stress
14
Normal YY Stress
15
Shear YZ Stress
16
Mid Principal Stress
17
Major Principal Y Cosine
18
Mid Principal Y Cosine
19
Minor Principal Y Cosine
20
Normal ZZ Stress
21
Shear XZ Stress
22
Minor Principal Stress
23
Major Principal Z Cosine
24
Mid Principal Z Cosine
25
Minor Principal Z Cosine
26
Grid ID indicating that stress results in the subsequent block are output at the specified Grid.
27
Normal XX Stress
28
Shear XY Stress
29
Major Principal Stress
30
Major Principal X Cosine
31
Mid Principal X Cosine
32
Minor Principal X Cosine
33
Mean Stress
34
von Mises Stress
35
Normal YY Stress
36
Shear YZ Stress
37
Mid Principal Stress
38
Major Principal Y Cosine
39
Mid Principal Y Cosine
40
Minor Principal Y Cosine
41
Normal ZZ Stress
42
Shear XZ Stress
43
Minor Principal Stress
44
Major Principal Z Cosine
45
Mid Principal Z Cosine
46
Minor Principal Z Cosine
47
Items 26 to 46 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

### Linear and Nonlinear Static Analysis

The supported Stress output parameters for Linear Static Analysis.

For Stress results the output is presented in the following format. The format for elemental results such as stress is dependent on the element type. Therefore, the following sections illustrate the format and stress entities for each element type.

#### 1D Elements - CBEAM

The order of information printed in the .pch file is:
Number
Result Type
1
CBEAM Grid ID
2
Station/Location Distance along the beam where stress is output
3
Longitudinal Stress at Point C
4
Longitudinal Stress at Point D
5
Longitudinal Stress at Point E
6
Longitudinal Stress at Point F
7
Maximum Stress
8
Minimum Stress
9
Safety Margin in Tension
10
Safety Margin in Compression
11
The above result block is repeated for all intermediate stations and the other end of the beam. Currently intermediate stations are not supported and are output as 0.0.

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBEAM, the stress recovery points are user-defined on the PBEAM Bulk Data Entry. For PBEAML, the stress recovery points are automatically defined by the beam type and dimensions. Stress recovery at intermediate stations along the CBEAM element is currently not supported.

#### CBAR

The order of information printed in the .pch file is:
Number
Result Type
1
CBAR Element ID
2
Bending Stress at Point C of End A
3
Bending Stress at Point D of End A
4
Bending Stress at Point E of End A
5
Bending Stress at Point F of End A
6
Axial Stress
7
Maximum Stress at End A
8
Minimum Stress at End A
9
Safety Margin in Tension
10
Bending Stress at Point C of End B
11
Bending Stress at Point D of End B
12
Bending Stress at Point E of End B
13
Bending Stress at Point F of End B
14
Maximum Stress at End B
15
Minimum Stress at End B
16
Safety Margin in Compression

Stress Results are output at ends A and B at stress recovery points C, D, E, and F. For PBAR, the stress recovery points are user-defined on the PBAR Bulk Data Entry. For PBARL, the stress recovery points are automatically defined by the beam type and dimensions.

#### CELAS

The order of information printed in the .pch file is:
Number
Result Type
1
CELAS Element ID
2
Stress along component listed on CELAS entry

#### CROD

The order of information printed in the .pch file is:
Number
Result Type
1
CROD Element ID
2
Axial Stress
3
Axial Stress Safety Margin
4
Torsional Stress
5
Torsional Stress Safety Margin

CTUBE element results are listed as CROD results in the .pch file.

#### CWELD

The order of information printed in the .pch file is:
Number
Result Type
1
CWELD Element ID
2
Axial Stress
3
Maximum Stress at End A
4
Minimum Stress at End A
5
Maximum Stress at End B
6
Minimum Stress at End B
7
Maximum Shear Stress
8
Bearing Stress

#### CBUSH

The order of information printed in the .pch file is:
Number
Result Type
1
CBUSH Element ID
2
Stress Translational X
3
Stress Translational Y
4
Stress Translational Z
5
Stress Moment X
6
Stress Moment Y
7
Stress Moment Z

Element Stress results are not output for CFAST elements in the .pch file.

#### 2D Elements

The type of stress information printed for 2D elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common. However, the results format and information depends on the results location requested on the STRESS entry.

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
2D Element ID
2
Fiber Distance (at location Z1 defined on PSHELL)
3
Normal XX Stress (at location Z1 defined on PSHELL)
4
Normal YY Stress (at location Z1 defined on PSHELL)
5
Shear XY Stress (at location Z1 defined on PSHELL)
6
Principal Stress Angle (at location Z1 defined on PSHELL)
7
Major Principal Stress (at location Z1 defined on PSHELL)
8
Minor Principal Stress (at location Z1 defined on PSHELL)
9
von Mises Stress (at location Z1 defined on PSHELL)
10
Fiber Distance (at location Z2 defined on PSHELL)
11
Normal XX Stress (at location Z2 defined on PSHELL)
12
Normal YY Stress (at location Z2 defined on PSHELL)
13
Shear XY Stress (at location Z2 defined on PSHELL)
14
Principal Stress Angle (at location Z2 defined on PSHELL)
15
Major Principal Stress (at location Z2 defined on PSHELL)
16
Minor Principal Stress (at location Z2 defined on PSHELL)
17
von Mises Stress (at location Z2 defined on PSHELL)
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
2D Element ID
2
CEN/ flag identifying that the current result block displays element center results.
3
An Integer listing the number of grid points of the element at which results are output in the subsequent block after the central results.
4
Fiber Distance (at location Z1 defined on PSHELL)
5
Normal XX Stress (at location Z1 defined on PSHELL)
6
Normal YY Stress (at location Z1 defined on PSHELL)
7
Shear XY Stress (at location Z1 defined on PSHELL)
8
Principal Stress Angle (at location Z1 defined on PSHELL)
9
Major Principal Stress (at location Z1 defined on PSHELL)
10
Minor Principal Stress (at location Z1 defined on PSHELL)
11
von Mises Stress (at location Z1 defined on PSHELL)
12
Fiber Distance (at location Z2 defined on PSHELL)
13
Normal XX Stress (at location Z2 defined on PSHELL)
14
Normal YY Stress (at location Z2 defined on PSHELL)
15
Shear XY Stress (at location Z2 defined on PSHELL)
16
Principal Stress Angle (at location Z2 defined on PSHELL)
17
Major Principal Stress (at location Z2 defined on PSHELL)
18
Minor Principal Stress (at location Z2 defined on PSHELL)
19
von Mises Stress (at location Z2 defined on PSHELL)
20
Grid Point ID at which stress results are output in the subsequent block.
21
Fiber Distance (at location Z1 defined on PSHELL)
22
Normal XX Stress (at location Z1 defined on PSHELL)
23
Normal YY Stress (at location Z1 defined on PSHELL)
24
Shear XY Stress (at location Z1 defined on PSHELL)
25
Principal Stress Angle (at location Z1 defined on PSHELL)
26
Major Principal Stress (at location Z1 defined on PSHELL)
27
Minor Principal Stress (at location Z1 defined on PSHELL)
28
von Mises Stress (at location Z1 defined on PSHELL)
29
Fiber Distance (at location Z2 defined on PSHELL)
30
Normal XX Stress (at location Z2 defined on PSHELL)
31
Normal YY Stress (at location Z2 defined on PSHELL)
32
Shear XY Stress (at location Z2 defined on PSHELL)
33
Principal Stress Angle (at location Z2 defined on PSHELL)
34
Major Principal Stress (at location Z2 defined on PSHELL)
35
Minor Principal Stress (at location Z2 defined on PSHELL)
36
von Mises Stress (at location Z2 defined on PSHELL)
37
Items 20 to 36 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

#### 3D Elements

The type and formatting of stress information printed for 3D elements (CHEXA, CTETRA, and CPENTA) is common. The order of information printed in the .pch file is:

CENTER
This is the default option for the location argument. The order of information printed in the .pch file is:
Number
Result Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested).
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX Stress
7
Shear XY Stress
8
Major Principal Stress
9
Major Principal X Cosine
10
Mid Principal X Cosine
11
Minor Principal X Cosine
12
Mean Stress
13
von Mises Stress
14
Normal YY Stress
15
Shear YZ Stress
16
Mid Principal Stress
17
Major Principal Y Cosine
18
Mid Principal Y Cosine
19
Minor Principal Y Cosine
20
Normal ZZ Stress
21
Shear XZ Stress
22
Minor Principal Stress
23
Major Principal Z Cosine
24
Mid Principal Z Cosine
25
Minor Principal Z Cosine
CUBIC, SGAGE, BILIN, or CORNER
Stress results are output at element center and grid points. The order of information printed in the .pch file is:
Number
Result Type
1
3D Element ID
2
Placeholder negative integer (-1).
3
GRID flag
4
Number of Grids at which results are output for the element mentioned in item 1 (set to 0 if only element center results are requested).
5
CENTER flag indicating that element center results are output in the following block.
6
Normal XX Stress
7
Shear XY Stress
8
Major Principal Stress
9
Major Principal X Cosine
10
Mid Principal X Cosine
11
Minor Principal X Cosine
12
Mean Stress
13
von Mises Stress
14
Normal YY Stress
15
Shear YZ Stress
16
Mid Principal Stress
17
Major Principal Y Cosine
18
Mid Principal Y Cosine
19
Minor Principal Y Cosine
20
Normal ZZ Stress
21
Shear XZ Stress
22
Minor Principal Stress
23
Major Principal Z Cosine
24
Mid Principal Z Cosine
25
Minor Principal Z Cosine
26
Grid ID indicating that stress results in the subsequent block are output at the specified Grid.
27
Normal XX Stress
28
Shear XY Stress
29
Major Principal Stress
30
Major Principal X Cosine
31
Mid Principal X Cosine
32
Minor Principal X Cosine
33
Mean Stress
34
von Mises Stress
35
Normal YY Stress
36
Shear YZ Stress
37
Mid Principal Stress
38
Major Principal Y Cosine
39
Mid Principal Y Cosine
40
Minor Principal Y Cosine
41
Normal ZZ Stress
42
Shear XZ Stress
43
Minor Principal Stress
44
Major Principal Z Cosine
45
Mid Principal Z Cosine
46
Minor Principal Z Cosine
47
Items 26 to 46 are repeated in sequence for all grid points of the element ID mentioned in item 1. The number of grid points for each element is mentioned in item 3.

GAUSS results are currently not supported for PCH output.

## Velocity

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the VELOCITY I/O Options Entry and Subcase Information Entry.

The Velocity output format and information in the PCH file varies based on:
1. Solution Sequence
2. Requested corresponding output parameters

This document contains details about PCH output for various solution sequences, with corresponding output parameters (wherever applicable). Example: PCH output from actual models are illustrated with information about the various sections of the output.

Similar PCH format documents are available for all supported output variables (STRESS, STRAIN, and so on). See the .pch file for a full list of supported output variables in conjunction with PCH output format, along with a link to each detailed PCH format documents.

### General Velocity PCH Format (File Specification)

The information in the PCH file varies depending on the requested output, however, some parts of the PCH file are common and the syntax is similar to most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported Velocity output parameters for Frequency Response Analysis.

#### General (Default)

For Velocity results with the default settings, for example if VELOCITY(PUNCH)=ALL/SID is used, the output is presented in the following format. For Frequency Response Analysis, the Velocity results are output for each loading frequency.

#### Sorted Output

The results can be sorted based on Frequency using the SORT1 (default) argument, as shown in General (Default). For Frequency Response Analysis, if grid SET is not specified, SORT1 is used, otherwise, SORT2 is used as default.

#### Output Form (form)

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in Sorted Output).

#### Filtered Output (peakoutput)

Output can be filtered based on the loading frequencies at which specified result peaks occur. This can be controlled on the PEAKOUT Bulk Data Entry. The format for the PCH output is the same as those shown in previous sections. The output is just a smaller subset of loading frequencies.

#### Normal Velocity (type)

Normal velocity results for grid points on the surface of shell and solid elements are output. The NORMAL argument can be used to generate this output. Currently NORMAL velocity results are not available in the PCH file.

### Random Response Analysis

The supported Velocity output parameters for Random Response Analysis.

#### General (Default) or Random Output (random)

For Velocity results with the default settings, for example if VELOCITY(PUNCH)=ALL/SID is used, the output is presented in the following format. For Random Response Analysis, the Velocity results are basically Power Spectral Density values for each loading frequency. Only PSD output (via PSDF argument) is output to the PCH file. RMS (cumulative) or RMS (Over frequencies) are not printed to the PCH file. The RMS results are only printed to the H3D file.

### Linear Transient Analysis

The supported Velocity output parameters for Linear Transient Analysis.

#### General (Default)

For Velocity results with the default settings, for example if VELOCITY(PUNCH)=ALL/SID is used, the output is presented in the following format. For Transient Response Analysis, the PCH file contains the Velocity values in SORT2 format by default, that is, the results for each Grid are grouped together.

#### Sorted Output

The results can be sorted based on Grid points using the SORT2 (default) argument, as shown in General (Default). The SORT1 argument, which sorts results wherein Time steps are grouped together is shown below. Transient Response Results are different when compared to the Frequency Response Results as the default sorting for Transient Results is SORT2.

### Linear Transient Analysis by Fourier Transformation

The supported Velocity output parameters for Linear Transient Analysis by Fourier Transformation.

#### General (Default)

For Velocity results with the default settings, for example if VELOCITY(PUNCH)=ALL/SID is used, the output is presented in the same format as Linear Transient Analysis.

## Force

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the ELEMENT FORCE I/O Options and Subcase Information Entry.

The Element force output format and information in the PCH file varies based on:
1. Solution Sequence
2. Requested corresponding output parameters
3. Element Type

This document contains details about PCH output for various solution sequences, with corresponding output parameters (wherever applicable). Example: PCH output from actual models are illustrated with information about the various sections of the output.

Similar PCH format documents are available for all supported output variables (STRESS, STRAIN, and so on). See the .pch file for a full list of supported output variables in conjunction with PCH output format, along with a link to each detailed PCH format documents.

### General Element Force PCH Format (File Specification)

The information in the PCH file varies depending on the requested output, however, some parts of the PCH file are common and the syntax is similar to most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported Element Force output parameters for Frequency Response Analysis.

For Element Force results, the output is presented in the following format. The format for elemental results as the force is dependent on the element type. Therefore, the format and element force entities for each element type are illustrated. The CONT term indicates that the result for the specified element continues in the subsequent line.

#### General (Default)

For Element Force results with the default settings, for example, if Element FORCE(PUNCH)=ALL/SID is used, the output is presented in the following format.
Note: The format for element results such as element force for frequency response analysis is output by default in SORT1 and in Real/Imaginary format.

#### 1D Elements

The order of information printed in the .pch file is:
Number
Result Type
1
1D Element ID
2
Grid ID A
3
Station A Dist/Length = 0.0
4
Bending Plane-1 A (Real)
5
Bending Plane-2 A (Real)
6
Shear Plane-1 A (Real)
7
Shear Plane-2 A (Real)
8
Axial Force A (Real)
9
Torque A (Real)
10
Warping Torque A (Real)
11
Bending Plane-1 A (Imag)
12
Bending Plane-2 A (Imag)
13
Shear Plane-1 A (Imag)
14
Shear Plane-2 A (Imag)
15
Axial Force A (Imag)
16
Torque A (Imag)
17
Warping Torque A (Imag)
18-161
Dummy ZERO values (for K=2…10 stations)
162
Grid ID B
163
Station A Dist/Length = 1.00
164
Bending Plane-1 B (Real)
165
Bending Plane-2 B (Real)
166
Shear Plane-1 B (Real)
167
Shear Plane-2 B (Real)
168
Axial Force B (Real)
169
Torque B (Real)
170
Warping Torque (Real)
171
Bending Plane-1 B (Imag)
172
Bending Plane-2 B (Imag)
173
Shear Plane-1 B (Imag)
174
Shear Plane-2 B (Imag)
175
Axial Force B (Imag)
176
Torque B (Imag)
177
Warping Torque B (Imag)
Number
Result Type
1
1D Element ID
2
Bending Plane-1 A ( Real)
3
Bending Plane-2 A (Real)
4
Bending Plane-1 B (Real)
5
Bending Plane-2 B (Real)
6
Shear Plane 1 (Average) (Real)
7
Shear Plane 2 (Average) (Real)
8
Axial Force (Average) (Real)
9
Torque (Average) (Real)
10
Bending Plane-1 A (Imag)
11
Bending Plane-2 A (Imag)
12
Bending Plane-1 B (Imag)
13
Bending Plane-2 B (Imag)
14
Shear Plane 1 (Average) (Imag)
15
Shear Plane 2 (Average) (Imag)
16
CBAR Axial Force (Average) (Imag)
17
Torque (Average) (Imag)
Number
Result Type
1
1D Element ID
2
MZ Bending end A Plane-1 (Real)
3
MY Bending end A Plane-2 (Real)
4
MZ Bending end B Plane-1 (Real)
5
MY Bending end B Plane-2 (Real)
6
FY Shear Force Plane 1 (Average) (Real)
7
FZ Shear Force Plane 2 (Average) (Real)
8
FX Axial Force (Average) (Real)
9
MX Torque (Average) (Real)
10
MZ Bending end A Plane-1 (Imag)
11
MY Bending end A Plane-2 (Imag)
12
MZ Bending end B Plane-1 (Imag)
13
MY Bending end B Plane-2 (Imag)
14
FY Shear Force Plane 1 (Average) (Imag)
15
FZ Shear Force Plane 2 (Average) (Imag)
16
FX Axial Force (Average) (Imag)
17
MX Torque (Average) (Imag)
Number
Result Type
1
1D Element ID
2
Compression Force in X (Real)
3
Shear Force in Y (Real)
4
Shear Force in Z (Real)
5
Axial Displacement in X (Real)
6
Shear Displacement in Y (Real)
7
Shear Displacement in Z (Real)
8
Slip Displacement in Y (Unsupported) (Real)
9
Slip Displacement in Y (Unsupported) (Real)
10
Compression Force in X (Imag)
11
Shear Force in Y (Imag)
12
Shear Force in Z (Imag)
13
Axial Displacement in X (Imag)
14
Shear Displacement in Y (Imag)
15
Shear Displacement in Z (Imag)
16
Slip Displacement in Y (Unsupported) (Imag)
17
Slip Displacement in Y (Unsupported) (Imag)
Number
Result Type
1
CROD Element ID
2
Element Force (Real)
3
Element Moment (Real)
4
Element Force (Imag)
5
Element Moment (Imag)
Number
Result Type
1
CELAS Element ID
2
Element Force (Real)
3
Element Force (Imag)
Number
Result Type
1
CBUSH Element ID
2
Element Force X (Real)
3
Element Force Y (Real)
4
Element Force Z (Real)
5
Element Moment X (Real)
6
Element Moment Y (Real)
7
Element Moment Z (Real)
8
Element Force X (Imag)
9
Element Force Y (Imag)
10
Element Force Z (Imag)
11
Element Moment X (Imag)
12
Element Moment Y (Imag)
13
Element Moment Z (Imag)
Number
Result Type
1
Element ID
2
Element Force (Real)
3
Element Force (Imag)
Number
Result Type
1
CVISC Element ID
2
Element Force (Real)
3
Element Force (Imag)
4
Element Moment (Real)
5
Element Moment (Imag)

#### 2D Elements

The type of Force information printed for 2D elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common.

If the element is in XY plane, the order of information printed in the .pch file is:
Number
Result Type
1
1D Element ID
2
Element Force XX (Real)
3
Element Force YY (Real)
4
Element Force XY (Real)
5
Element Moment XX (Real)
6
Element Moment YY (Real)
7
Element Moment XY (Real)
8
Element Force ZX (Shear x) (Real)
9
Element Force YZ (Shear y) (Real)
10
Element Force XX (Imag)
11
Element Force YY (Imag)
12
Element Force XY (Imag)
13
Element Moment XX (Imag)
14
Element Moment YY (Imag)
15
Element Moment XY (Imag)
16
Element Force ZX (Shear x) (Imag)
17
Element Force YZ (Shear y) (Imag)

#### Sorted Output

The results can be sorted based on Frequency using the SORT1 (default) argument, as shown in General (Default) The SORT2 argument, which sorts results wherein elements are grouped by giving element forces for respective loading frequencies together (Figure 43) by interchanging the element ID location and loading frequency location.

#### Output Form

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in Sorted Output). The PHASE argument provides output in the Polar format shown below (SORT2 format is illustrated).
Number
Result Type
1
2
Element Force XX (Real)
3
Element Force YY (Real)
4
Element Force XY (Real)
5
Element Moment XX (Real)
6
Element Moment YY (Real)
7
Element Moment XY (Real)
8
Element Force ZX (Real)
9
Element Force YZ (Real)
10
Element Force XX (Imag)
11
Element Force YY (Imag)
12
Element Force XY (Imag)
13
Element Moment XX (Imag)
14
Element Moment YY (Imag)
15
Element Moment XY (Imag)
16
Element Force ZX (Imag)
17
Element Force YZ (Imag)

#### Filtered Output (peakoutput)

Output can be filtered based on the loading frequencies at which specified result peaks occur. This can be controlled on the PEAKOUT Bulk Data Entry. The format for the PCH output is the same as those shown in previous sections. The output is just a smaller subset of loading frequencies.

### Modal Output (modal)

Modal Element Force can be output for any Modal Frequency Response Subcase with the MODAL argument. It gives element force results at different modes.

#### 1D Elements

The order of information printed in the .pch file is:
Number
Result Type
1
1D Element ID
2
Grid ID A
3
Station A Dist/Length = 0.0
4
Bending Plane-1 A (Real)
5
Bending Plane-2 A (Real)
6
Shear Plane-1 A (Real)
7
Shear Plane-2 A (Real)
8
Axial Force A (Real)
9
Torque A (Real)
10
Warping Torque A (Real)
11-91
Dummy ZERO values (for K=2…10 stations)
92
Grid ID B
93
Station A Dist/Length = 1
94
Bending Plane-1 B (Real)
95
Bending Plane-2 B (Real)
96
Shear Plane-1 B (Real)
97
Shear Plane-2 B (Real)
98
Axial Force B (Real)
99
Torque B (Real)
100
Warping Torque (Real)
Number
Result Type
1
1D Element ID
2
Bending Plane-1 A (Real)
3
Bending Plane-2 A (Real)
4
Bending Plane-1 B (Real)
5
Bending Plane-2 B (Real)
6
Shear Plane-1 (Average) (Real)
7
Shear Plane-2 (Average) (Real)
8
Axial Force (Average) (Real)
9
Torque (Average) (Real)
Number
Result Type
1
1D Element ID
2
MZ Bending end A Plane-1 (Real)
3
MY Bending end A Plane-2 (Real)
4
MZ Bending end B Plane-1 (Real)
5
MY Bending end B Plane-2 (Real)
6
FY Shear Force Plane-1 (Average) (Real)
7
FZ Shear Force Plane-2 (Average) (Real)
8
FX Axial Force (Average) (Real)
9
MX Torque (Average) (Real)
Number
Result Type
1
1D Element ID
2
Compression Force in X (Real)
3
Shear Force in Y (Real)
4
Shear Force in Z (Real)
5
Axial Displacement in X (Real)
6
Shear Displacement in Y (Real)
7
Shear Displacement in Z (Real)
8
Slip Displacement in Y (Unsupported) (Real)
9
Slip Displacement in Y (Unsupported) (Real)
Number
Result Type
1
CROD Element ID
2
Element Force (Real)
3
Element Force (Real)
Number
Result Type
1
Element ID
2
Element Force (Real)
Number
Result Type
1
CBUSH Element ID
2
Element Force X (Real)
3
Element Force Y (Real)
4
Element Force Z (Real)
5
Element Moment X (Real)
6
Element Moment Y (Real)
7
Element Moment Z (Real)
Number
Result Type
1
Element ID
2
Element Force (Real)
Number
Result Type
1
CVISC Element ID
2
Element Force (Real)
3
Element Force (Real)

#### 2D Elements

The type of Force information printed for 2D elements in Modal output (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) is common.

If the element is in XY plane, the order of information printed in the .pch file is:
Number
Result Type
1
1D Element ID
2
Element Force XX (Real)
3
Element Force YY (Real)
4
Element Force XY (Real)
5
Element Moment XX (Real)
6
Element Moment YY (Real)
7
Element Moment XY (Real)
8
Element Force ZX (Real)
9
Element Force YZ (Real)

## Multipoint Constraint Force (MPCFORCE)

The Nastran Punch (PCH) format file contains various supported output across multiple solution sequences.

The output request initiation and corresponding parameters are controlled by the MPCFORCE I/O Options and Subcase Information Entry.

The MPCFORCE output format and information in the PCH file vary based on:
1. Solution sequence
2. Requested corresponding output parameters

This section contains details about PCH output for various Frequency Response Analysis with corresponding output parameters (wherever applicable). Example, PCH output from actual models is illustrated with information about the various sections of the output.

### General MPCFORCE PCH Format (File Specification)

The information in the PCH file varies depending on the requested output, however, some parts of the PCH file are common and the syntax is similar to most output data.

The PCH file consists of data blocks, each containing corresponding information for the listed Subcase or the subsequent subset data (for example, eigenvalue or time step).

Each data block is printed with the following format.

Line 1 - $TITLE = This represents the Solver Name (OptiStruct) and the version Number (for example, 14.0.220). Line 2 - $SUBTITLE =

Line 3 - $LABEL = This is the label of the Current Subcase (this is input in the model) Line 4 - $<result type> = This represents the type of results being printed in this data block.

Line 5 - $SUBCASE ID = This represents the ID of the subcase for which the results are printed in this data block. The $LABEL field in line 3 corresponds to this subcase.

### Frequency Response Analysis

The supported MPCFORCE output parameters for Frequency Response Analysis.

#### General (Default)

For MPCFORCE results with the default settings, for example, if MPCFORCE(PUNCH)=ALL/SID is used, the output is presented in the following format. The format for nodal results such as MPCFORCE for frequency response analysis is output by default in SORT1 and in Real/Imaginary format as:
The order of information printed in the .pch file immediately following the file specification section is:
Number
Result Type
1
Grid ID at which MPCFORCE is requested
2
The character “G” identifying that the results are for a particular grid
3
Real part of the Translational MPCFORCE along X
4
Real part of the Translational MPCFORCE along Y
5
Real part of the Translational MPCFORCE along Z
6
Real part of the Rotational MPCFORCE (MPC Moment) along X
7
Real part of the Rotational MPCFORCE (MPC Moment) along Y
8
Real part of the Rotational MPCFORCE (MPC Moment) along Z
9
Imaginary part of the Translational MPCFORCE along X
10
Imaginary part of the Translational MPCFORCE along Y
11
Imaginary part of the Translational MPCFORCE along Z
12
Imaginary part of the Rotational MPCFORCE (MPC Moment) along X
13
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Y
14
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Z
–CONT–
Indicates that the result for the specified Grid Point continues in the subsequent line.

#### Sorted Output

The results can be sorted based on Frequency using the SORT1 (default) argument, as shown in General MPCFORCE PCH Format (File Specification). The SORT2 argument, which sorts results wherein grid/elements are grouped together (Figure 56). For Frequency Response Analysis, if grid SET is not specified, SORT1 is used, otherwise, SORT2 is used as default.
The order of information printed in the .pch file immediately following the file specification section is:
Number
Result Type
1
Grid ID at which MPCFORCE is requested
2
The character “G” identifying that the results are for a particular grid
3
Real part of the Translational MPCFORCE along X
4
Real part of the Translational MPCFORCE along Y
5
Real part of the Translational MPCFORCE along Z
6
Real part of the Rotational MPCFORCE (MPC Moment) along X
7
Real part of the Rotational MPCFORCE (MPC Moment) along Y
8
Real part of the Rotational MPCFORCE (MPC Moment) along Z
9
Imaginary part of the Translational MPCFORCE along X
10
Imaginary part of the Translational MPCFORCE along Y
11
Imaginary part of the Translational MPCFORCE along Z
12
Imaginary part of the Rotational MPCFORCE (MPC Moment) along X
13
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Y
14
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Z
–CONT–
Indicates that the result for the specified Grid Point continues in the subsequent line.

#### Output Form (form)

The format of the output can be selected using the form option. For PCH output, the REAL/IMAG (default) or PHASE arguments are available. The REAL/IMAG arguments provide output in the Rectangular format (shown in Figure 57). The PHASE argument provides output in the Polar format shown below (SORT2 format is illustrated).
The order of information printed in the .pch file immediately following the file specification section is:
Number
Result Type
1
Grid ID at which MPCFORCE is requested
2
The character “G” identifying that the results are for a particular grid
3
Real part of the Translational MPCFORCE along X
4
Real part of the Translational MPCFORCE along Y
5
Real part of the Translational MPCFORCE along Z
6
Real part of the Rotational MPCFORCE (MPC Moment) along X
7
Real part of the Rotational MPCFORCE (MPC Moment) along Y
8
Real part of the Rotational MPCFORCE (MPC Moment) along Z
9
Imaginary part of the Translational MPCFORCE along X
10
Imaginary part of the Translational MPCFORCE along Y
11
Imaginary part of the Translational MPCFORCE along Z
12
Imaginary part of the Rotational MPCFORCE (MPC Moment) along X
13
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Y
14
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Z
–CONT–
Indicates that the result for the specified Grid Point continues in the subsequent line.

#### Filtered Output (peakoutput)

Output can be filtered based on the loading frequencies at which specified result peaks occur. This can be controlled on the PEAKOUT Bulk Data Entry. The format for the PCH output is the same as those shown in previous sections. The output is just a smaller subset of loading frequencies.

#### Modal Output (modal)

Modal MPCFORCE can be output for any Modal Frequency Response Subcase with the MODAL argument. The modal MPCFORCE will be output; however, corresponding FRF MPCFORCE is not output in conjunction. Therefore, either FRF MPCFORCE is output (without MODAL argument) or Modal MPCFORCE is output (with MODAL argument).

Modal MPCFORCE can be defined as the Multi-Point Constraint Forces and Moments calculated based on the structural Eigenvectors and residual vectors.

The order of information printed in the .pch file immediately following the file specification section is:
Number
Result Type
1
Grid ID at which MPCFORCE is requested
2
The character “G” identifying that the results are for a particular grid
3
Real part of the Translational MPCFORCE along X
4
Real part of the Translational MPCFORCE along Y
5
Real part of the Translational MPCFORCE along Z
6
Real part of the Rotational MPCFORCE (MPC Moment) along X
7
Real part of the Rotational MPCFORCE (MPC Moment) along Y
8
Real part of the Rotational MPCFORCE (MPC Moment) along Z
9
Imaginary part of the Translational MPCFORCE along X
10
Imaginary part of the Translational MPCFORCE along Y
11
Imaginary part of the Translational MPCFORCE along Z
12
Imaginary part of the Rotational MPCFORCE (MPC Moment) along X
13
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Y
14
Imaginary part of the Rotational MPCFORCE (MPC Moment) along Z
–CONT–
Indicates that the result for the specified Grid Point continues in the subsequent line.