Load Collectors
Load collectors collect and organize loads, constraints, and equations.
Abaqus Cards
Loads or constraints that are to be used as history data
(under *STEP) should be collected into load collectors with the HISTORY card image. These load collectors also need to be added to the
corresponding load steps (*STEP). In contrast, loads or constraints for model data should be
collected into load collectors with INITIAL_CONDITION card image.
They will automatically be written out in the model portion of the Abaqus input deck.
Note: All loads and boundary conditions on sets can
be expanded to individual nodes and elements by selecting the Expand load on
sets option in the File Options dialog, which is invoked upon
importing a solver deck. If a **HMLOAD_SETS_EXPAND comment is found in the input file,
all loads and boundary conditions on sets are expanded to individual nodes and
elements.
| Card | Description |
|---|---|
| *CFILM | Defines film coefficients and associated sink temperatures at one or more
nodes or vertices. Note: Only in HISTORY card image.
|
| *CONNECTOR HARDENING | |
| *CONNECTOR LOAD | Specifies loads for available components of relative motion in connector
elements. Note: Only in HISTORY card image.
|
| *CONNECTOR MOTION | Specifies the motion of available components of relative motion in connector
elements. Note: In both HISTORY and INTIAL_CONDITION card image.
|
| *DLOAD,VBF (Viscous body force) |
Note: Only in HISTORY card image.
|
| *DSLOAD | Specifies distributed surface loads. Note: Only in HISTORY card image.
|
| *INERTIA RELIEF | Applies inertia-based load balancing. Note: Only in HISTORY card image of
Standard template.
|
| *INITIAL_CONDITION_FLUID_PRESSURE | Specifies initial pressures for hydrostatic fluid filled cavities. |
| *INITIAL_CONDITION_TEMPERATURE | Specifies initial temperatures for heat transfer analysis. |
| *INITIAL_CONDITION_TYPE_STRESS | Specifies initial stresses. |
| *INITIAL_CONDITION_VELOCITY | Specifies initial velocities for dynamic analysis. |
| *SFILM | Define film coefficients and associated sink temperatures over a surface for
heat transfer analysis. Note: Only in HISTORY card image.
|
| *TRANSPORT VELOCITY | Define the angular velocity of material transported through the mesh of a
deformable body or the transport of material relative to the reference node of a
rigid body during a steady-state transport analysis. Note: Only in HISTORY card image.
|
EXODUS Cards
| Card | Description |
|---|---|
| Acceleration | |
| Boundary | |
| Force | |
| Flux | |
| Moment | |
| Thermal | |
| Velocity |
LS-DYNA Cards
Load collector information is specified with a required $HMNAME comment card and an optional $HMCOLOR comment card. If an input translator encounters one of these comments while reading a load card, a new load collector is created. For the comments to be valid, they must follow a load keyword or the last line of the previous Structured block. The loads that follow a $HMNAME LOADCOLS comment are read into that collector. If there is a new keyword or structured block, the previous load collector information is ignored.
For non-HyperMesh generated input decks, loads are divided into
collectors based on classification. The following load collectors are created:
- Mechanical loads for forces and moments
- Constraints/Displacements
- Velocities
- Accelerations
- Pressures
If translational or rotational constraints are defined in the input model, they are placed in a separate load collector named Nodal Constraints.
Load collectors are not used by LS-DYNA, but are useful for visualization. Additional load collectors can be defined to describe other entities.
| Card | Description |
|---|---|
| *BOUNDARY_NON_REFLECTING | Define a non-reflecting boundary. This option applies to continuum domains modeled with solid elements. |
| *BOUNDARY_NON_REFLECTING_2D | Define a non-reflecting boundary. This option applies to continuum domains modeled with two-dimensional solid elements in the 𝑥𝑦 plane. |
| *BOUNDARY_PRESCRIBED_ACCELEROMETER_RIGID | Prescribe the motion of a rigid body based on experimental data obtained from accelerometers affixed to the rigid body. |
| *CONSTRAINED_RIGID_BODY_STOPPERS | Stops the motion based on a time dependent constraint. The stopper overrides prescribed motion boundary conditions, except relative displacement, operating in the same direction for both the main and secondary rigid bodies. |
| *DEFINE_CURVE_FEEDBACK | Define information that is used as the solution evolves to scale the ordinate values of the specified load curve ID. |
| *DEFORMABLE_TO_RIGID |
Define materials to be switched to rigid at the start of the
calculation.
Note: Select an arraycount for the PSID and MRB pairs.
|
| *DEFORMABLE_TO_RIGID_AUTOMATIC |
Define a set of parts to be switched to rigid or to deformable at some stage
during the calculation.
Note: Change the option to automatic and card edit. In
the D2R fields enter the number of PIDs that need to be converted to Rigid.
Create an entity set of comps of the secondary PIDs and select the
set.
|
| *DEFORMABLE_TO_RIGID_INERTIA | Inertial properties can be defined for the new rigid bodies that are created when the deformable parts are switched. These can only be defined in the initial input if they are needed in a later restart. |
| *INITIAL_AXIAL_FORCE_BEAM | Initialize the axial force resultants in beam elements that are used to model bolts. |
| *INITIAL_CONTACT_WEAR | Initialize contact wear for simulation of wear processes. |
| *INITIAL_CRASHFRONT | Card allows the user to initialize crashfront nodes for damage that may occur prior to the simulation. |
| *INITIAL_DETONATION | Define points to initiate the location of high explosive detonations in part IDs which use the material (type 8) *MAT_HIGH_EXPLOSIVE_BURN. |
| *INITIAL_STRESS_SECTION | Initialize stress in solid sections |
| *INITIAL_VEHICLE_KINEMATICS | Define initial kinematical information for a vehicle. |
| *INITIAL_VELOCITY_GENERATION_START_TIME | Define a time to initialize velocities after time zero. |
| *INTERFACE_SPRINGBACK | Define a material subset for an implicit springback calculation in LS-DYNA and any nodal constraint to eliminate rigid body degrees-of-freedom. |
| *INTERFACE_SPRINGBACK_LSDYNA | |
| *INTERFACE_SPRINGBACK_LSDYNA_NOTHICKNESS | |
| *INTERFACE_SPRINGBACK_LSDYNA_THICKNESS | |
| *INTERFACE_SPRINGBACK_NASTRAN | |
| *INTERFACE_SPRINGBACK_NASTRAN_NOTHICKNESS | |
| *INTERFACE_SPRINGBACK_NASTRAN_THICKNESS | |
| *INTERFACE_SPRINGBACK_SEAMLESS | |
| *INTERFACE_SPRINGBACK_SEAMLESS_NOTHICKNESS | |
| *INTERFACE_SPRINGBACK_SEAMLESS_THICKNESS | |
| *LOAD_BLAST | Define an airblast function for the application of pressure loads due to explosives in conventional weapons. |
| *LOAD_BODY_GENERALIZED | Define body force loads due to a prescribed base acceleration or prescribed angular velocity over a subset of the complete problem. |
| *LOAD_BODY_PARTS |
Define body force loads due to a prescribed base acceleration or angular
velocity using global axes directions.
Note: Select component set.
|
| *LOAD_BODY_VECTOR |
Define body force loads due to a prescribed base acceleration or angular Velocity, for loading in any direction, specified by vector components |
| *LOAD_BRODE | Define Brode function for application of pressure loads due to explosion. |
| *LOAD_SUPERELASTIC_FORMING |
Perform superplastic forming (SPF) analysis, this option must be used with material model 64, *MAT_RATE_SENSITIVE_POWERLAW_PLASTICITY, for strain rate sensitive, powerlaw plasticity. |
Nastran Cards
Nastran supports specific and generic load collectors. Specific load collectors have a card image which can be edited to group other load collectors together for simultaneous application in a single subcase, or to provide special information for a specific analysis type, such as modal analysis. Use specific load collectors for specialized loading cards, such as SPCADD, MPCADD, EIGB, EIGP, EIGR, FREQ, FREQ1, LOAD, GRAV, RFORCE, and TEMPD. Generic load collectors do not have a card image. Use generic load collectors to collect loads and constraints for display purposes and to assign an ID to the loads.
General boundary conditions, such as loads and constraints, should not be collected into specific load collectors. Organizing loads and constraints into a specific load collector may result in an error termination.
When a Nastran deck is imported into HyperMesh, loads that have the same SID are collected into the same
load collector. If a load collector already exists in the database with the same SID, one of
the following can occur:
- If overwrite is off (default), the new load collector’s ID is offset and all loads in that collector will have a new SID upon export.
- If overwrite is on, the new load collector replaces the existing load collector. The original load collector and the loads it contains are deleted.
| Card | Description |
|---|---|
| AEFACT | Defines real numbers for aeroelastic analysis. |
| AEPARM | Defines a general aerodynamic trim variable degree-of-freedom (aerodynamic extra point). |
| AESTAT | Specifies rigid body motions to be used as trim variables in static aeroelasticity. |
| AEFORCE | Defines a vector of absolute or “per unit dynamic pressure” forces associated with a particular control vector. |
| BCPARA | Defines contact parameters. |
| BCRPARA | |
| BMFACE | |
| DAMPING | Defines a parameter and hybrid damping specification. |
| DELAY | Defines the time delay term in the equations of the dynamic loading
function. Note: Supported as constraints.
|
| DTI SPECSEL | Defines table data blocks |
| EIGB | Defines data needed to perform buckling analysis |
| EIGP | Defines poles that are used in complex eigenvalue extraction by the Determinant method |
| EIGR | Defines data needed to perform real eigenvalue analysis |
| FLFACT | Used to specify density ratios, Mach numbers, reduced frequencies, and velocities for flutter analysis. |
| FLUTTER | Defines data needed to perform flutter analysis. |
| FREQ | Defines a set of frequencies to be used in the solution of frequency response
problems. Note: Defined using FREQi.
|
| FREQ1 | Defines a set of frequencies to be used in the solution of frequency response
problems by specification of a starting frequency, frequency increment, and the
number of increments desired. Note: Defined using
FREQi.
|
| FREQ2 | Alternative form of frequency list. Defines a set of frequencies to be used
in the solution of frequency response problems by specification of a starting
frequency, final frequency, and the number of logarithmic increments desired. Note: Defined using FREQi.
|
| FREQ3 | Frequency List, Alternate Form 3. Defines a set of frequencies for the modal
method of frequency response analysis by specifying the number of frequencies
between modal frequencies. Note: Defined using
FREQi.
|
| FREQ4 | Frequency List, Alternate Form 4. Defines a set of frequencies for the modal
method of frequency response analysis by specifying the amount of "spread" around
each modal frequency and the number of equally spaced frequencies within the
spread. Note: Defined using FREQi.
|
| FREQ5 | Frequency List, Alternate Form 5. Defines a set of frequencies for the modal
method of frequency response analysis by specification of a frequency range and
fractions of the natural frequencies within that range. Note: Defined using FREQi.
|
| GRAV | Defines acceleration vectors for gravity or other acceleration loading |
| GUST | Selects the gust field in an aeroelastic response problem. |
| HYBDAMP | Defines a hybrid modal damping for direct dynamic solutions. |
| LOAD | Defines a static load as a linear combination of load sets defined via FORCE, MOMENT, FORCE1, MOMENT1, FORCE2, MOMENT2, PLOAD, PLOAD1, PLOAD2, PLOAD4, PLOADX1, SLOAD, RFORCE, and GRAV entries. |
| LSEQ | Defines a sequence of static load sets. |
| MFLUID | Defines the properties of an incompressible fluid volume for the purpose of generating a virtual mass matrix. |
| MKAERO1 | Provides a table of Mach numbers (m) and reduced frequencies (k) for aerodynamic matrix calculation. |
| MPCADD | Defines a multipoint constraint set as a union of multipoint constraint sets defined via MPC entries. |
| NLAUTO | Defines parameters for automatic or fixed load/time stepping used in SOL 600 only. |
| NLRGAP | Defines a nonlinear radial (circular) gap for transient response or nonlinear harmonic response. |
| NLSTEP | Describes the control parameters for Mechanical, Thermal and Coupled Analysis in SOL 400 and for Linear Contact Analysis in SOL 101. |
| NLSTRAT | Defines strategy parameters for nonlinear structural analysis used in SOL 600 only. |
| NOLIN1 | Defines a forcing function for transient responses or nonlinear harmonic responses. |
| NSMADD | Defines non structural mass as the sum of the sets listed. |
| NTHICK | Defines nodal thickness values for beams, plates and/or shells. |
| RADCAV | Identifies the characteristics of each radiant enclosure. |
| RANDPS | Defines load set power spectral density factors for use in random analysis having the frequency dependent form: |
| RFORCE | Defines a static loading condition due to an angular velocity and/or acceleration |
| RSPEC | Defines a directional combination method, modal combination method, excitation direction(s), response spectra and scale factors for response spectrum analysis. |
| SPC1 | Defines a single-point constraint, alternate form. |
| SPCADD | Defines a single-point constraint set as a union of single-point constraint sets defined on SPC or SPC1 entries |
| SPCR | Defines an enforced relative displacement value for a load step in SOL 400 and SOL 600. |
| TABDMP1 | Defines modal damping as a tabular function of natural frequency |
| TABLED1 | Defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads |
| TABLED2 | Defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads. Also contains parametric data for use with the table |
| TABLED3 | Defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads. Also contains parametric data for use with the table |
| TABLED4 | Defines the coefficients of a power series for use in generating frequency-dependent and time-dependent dynamic loads. Also contains parametric data for use with the table |
| TABLEM1 | Defines a tabular function for use in generating temperature-dependent material properties. |
| TABLEM2 | Defines a tabular function for use in generating temperature-dependent material properties. Also contains parametric data for use with the table. |
| TABLEM3 | Defines a tabular function for use in generating temperature-dependent material properties. Also contains parametric data for use with the table. |
| TABLEM4 | Defines coefficients of a power series for use in generating temperature-dependent material properties. Also contains parametric data for use with the table. |
| TABLES1 | Defines a tabular function for stress-dependent material properties such as the stress-strain curve (MATS1 entry), creep parameters (CREEP entry) and hyperelastic material parameters (MATHP entry). |
| TABLEST | Specifies the material property tables for nonlinear elastic temperature-dependent materials |
| TABRND1 | Defines power spectral density as a tabular function of frequency for use in random analysis. Referenced by the RANDPS entry. |
| TEMPD | Defines a temperature value for all grid points of the structural model that have not been given a temperature on a TEMP entry. |
| TIC | Defines values for the initial conditions of variables used in structural transient analysis. Both displacement and velocity values may be specified at independent degrees-of-freedom. This entry may not be used for heat transfer analysis. |
| TRIM | Specifies constraints for aeroelastic trim variables. The SPLINE1 and SPLINE4 entries need to be here for the finite plate spline. |
| TSTEP | Defines time step intervals at which a solution will be generated and output in transient analysis |
| TSTEPNL | Defines parametric controls and data for nonlinear transient structural or heat transfer analysis. TSTEPNL is intended for SOLs 129, 159, and 99. |
| UXVEC | Specification of a vector of aerodynamic control point (extra point) values. |
| VIEW | Defines radiation cavity and shadowing for radiation view factor calculations. |
| VIEW3D | Defines parameters to control and/or request the Gaussian Integration method of view factor calculation for a specified cavity. |
OptiStruct Cards
Specific load collectors are used for specialized loading cards, such as SPCADD, GRAV, RLOAD and DTABLEi. Specific load collectors have a card image which can be edited to group other load collectors together for simultaneous application in a single subcase, or to provide special information for a specific analysis type, such as modal analysis.
General boundary conditions, such as loads and constraints, should not be collected into specific load collectors. Organizing loads and constraints into a specific load collector may result in an error termination.
| Card | Description |
|---|---|
| CDSMETH | Can be used in the component dynamic synthesis method for
generating component dynamic matrices at each loading frequency. Note: Bulk Data
Entry
|
| CMSMETH | Defines the CMS (Component Mode Synthesis) method,
frequency upper limit, number of modes, and starting SPOINT ID to
be used in a CMS solution. The eigenvalue solver is also specified. In addition,
preload as well as loads for reduction and residual vector generation can be
defined. Also, an ASCII file containing
CELAS4 and CDAMP3 element data and/or their
corresponding design variable definitions can be generated for
DMIG to allow the use of the component modes in optimization
runs. Note: Bulk
Data Entry
|
| CNTSTB | Defines parameters for stabilization control of
surface-to-surface contact and large displacement node-to-surface contact. A
CNTSTB Bulk Data Entry should be referenced by a
CNTSTB Subcase Information entry to be applied in a particular
subcase. Note: Bulk
Data Entry
A CNTSTB Bulk Data Entry should be referenced by a CNTSTB Subcase Information entry to be applied in a particular subcase. |
| CNVGADD | Allows referencing a combined free convection definition via multiple
CONVG Bulk Data Entries. Note: Bulk Data
Entry
|
| CONVG | Defines free convection via automatic generation of free convection entries.
This entry also supports subcase-dependent free convection. Note: Bulk Data Entry
|
| DTI, SPECSEL | Correlates spectra lines specified on
TABLED1 entries with damping values. Note: Bulk
Data Entry
|
| FATDEF | Defines elements, and associated fatigue properties, for
consideration in a fatigue analysis. Note: Bulk
Data Entry
|
| FATEVNT | Defines loading events for fatigue analysis. Note: Bulk
Data Entry
|
| FATLOAD | Defines fatigue loading parameters. Note: Bulk
Data Entry
|
| FATMCRV | Specifies the corresponding quantities (Ti) vs SN curve
table ID’s via TABLEXN entries (TIDi). Note: Bulk Data Entry
|
| FATPARM | Used to define parameters required for a Fatigue
Analysis. Note: Bulk
Data Entry
|
| FATSEAM | Defines parameters and property identification data for
Seam Weld Fatigue Analysis. Note: Bulk Data Entry
|
| FATSEQ | Defines a loading sequence for a Fatigue
Analysis. Note: Bulk
Data Entry
|
| FLLWER | Define parameters for the calculation of loads dependent
on deformation. Two type of loads, pressure load (only PLOAD4
Bulk Data Entries) and concentrated force (only
FORCE1/FORCE2 Bulk Data Entries) can use
this entry to control the options for Follower Loads. Note: Bulk
Data Entry
|
| FREQ | Defines a set of frequencies to be used in the solution of
frequency response problems. Note: Bulk
Data Entry
|
| FREQ1 | Defines a set of frequencies to be used in the solution of
frequency response problems by specification of a starting frequency, frequency
increment, and the number of increments desired. Note: Bulk
Data Entry
Defined using FREQi. |
| FREQ2 | Defines a set of frequencies to be used in the solution of
frequency response problems by specification of a starting frequency, final
frequency, and the number of logarithmic increments desired. Note: Bulk
Data Entry
Defined using FREQi. |
| FREQ3 | Defines a set of frequencies for the modal method of
frequency response analysis by specifying the number of frequencies between modal
frequencies. Note: Bulk
Data Entry
Defined using FREQi. |
| FREQ4 | Defines a set of frequencies for the modal method of
frequency response analysis by specifying the amount of "spread" around each modal
frequency and the number of equally spaced frequencies within the spread. Note: Bulk
Data Entry
Defined using FREQi. |
| FREQ5 | Defines a set of frequencies for the modal method of
frequency response analysis by specification of a frequency range and fractions of
the natural frequencies within that range. Note: Bulk
Data Entry
Defined using FREQi. |
| FSI | Identifies a FSI Bulk Data Entry to run Fluid-Structure
Interaction Analysis with Altair AcuSolve for a Linear
Transient Heat Transfer Subcase or Nonlinear Direct Transient Analysis
Subcase. Note: Bulk
Data Entry
|
| GRAV | Defines the gravity vectors for use in determining gravity
loading for the static structural model. It can also be used to define the
EXCITEID field (Amplitude "A") of dynamic loads in
RLOAD1, RLOAD2, TLOAD1,
TLOAD2 and NLOAD1 Bulk Data Entries for
dynamic solution sequences. Note: Bulk
Data Entry
|
| HYBDAMP | This Bulk Data Entry defines the application of modal
damping to the residual structure in a Direct Transient or Frequency Response
analysis. Note: Bulk
Data Entry
|
| INVELB | Defines initial velocity in a multibody
situation. Note: Bulk
Data Entry
|
| LOAD | The LOAD is equivalent to the
LOADADD. Note: Bulk
Data Entry
|
| LOADJG | Defines loading for joint connector JOINTG Bulk Data
Entry. Note: Bulk Data Entry
|
| MBACT | Defines the entity/set that needs to be activated in the
multibody system for the subsequent simulation. Note: Bulk
Data Entry
|
| MBDEACT | Defines the entity/set that needs to be deactivated in
the multibody system for the subsequent simulation. Note: Bulk
Data Entry
|
| MBLIN | Defines the parameters for a multibody system linear
analysis. Note: Bulk
Data Entry
|
| MBREQ | Defines a multibody as a combination of request sets
defined via MBREQE and MBREQM. Note: Bulk
Data Entry
|
| MBREQE | Defines a multibody solver output request to output the
results of a set of expressions. Note: Bulk
Data Entry
|
| MBREQM | Defines a multibody solver output request to output
displacement, velocity, acceleration, or force with respect to markers. Note: Bulk
Data Entry
|
| MBSEQ | Defines the simulation sequence for the multibody
solver. Note: Bulk
Data Entry
|
| MBSIM | Defines the parameters for a multibody
simulation. Note: Bulk
Data Entry
|
| MBSIMP | Defines the simulation parameters for subsequent multibody
simulation. Note: Bulk
Data Entry
|
| MBVAR | Defines a multibody solver variable which can be referred
to by multiple expressions. Note: Bulk
Data Entry
|
| MFLUID | Selects the MFLUID Bulk Data entries to be used to specify
the fluid-structure interface Note: Bulk
Data Entry
|
| MLOAD | Defines a multibody as a linear combination of load sets
defined via GRAV, MBFRC,
MBFRCC, MBFRCE, MBMNT,
MBMNTC, MBMNTE, MBSFRC,
MBSFRCC, MBSFRCE, MBSMNT,
MBSMNTC, and MBSMNTE. Note: Bulk
Data Entry
|
| MOTION | Defines a multibody as a combination of motion sets
defined via MOTNJ, MOTNJC,
MOTNJE, MOTNG, MOTNGC,
and MOTNGE. Note: Bulk
Data Entry
|
| MOTNJG | Defines motion for joint connector JOINTG Bulk Data
Entry. Note: Bulk Data Entry
|
| MPCADD | Defines a multipoint constraint set as a union of
multipoint constraint sets defined via MPC entries. Note: Bulk
Data Entry
|
| NLOAD | Defines a loading condition for nonlinear problems as a
linear combination of load sets defined via NLOAD1. Note: Bulk
Data Entry
|
| NLOAD1 | Defines a time-dependent load or enforced motion for use
in geometric nonlinear analysis. Note: Bulk
Data Entry
|
| NLPARMX | Defines additional parameters for geometric nonlinear
implicit static analysis. Note: Bulk
Data Entry
|
| NOLIN1 | Defines nonlinear transient forcing functions of the form:
Pi(t)=S⋅T(uj(t)) (Function of displacement) and
Pi(t)=S⋅T(˙uj(t)) (Function of velocity),
where, uj(t) and ˙uj(t) are the displacement and velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry
|
| NOLIN2 | Defines nonlinear transient forcing functions of the form:
Pi(t)=S⋅Xj(t)⋅Xk(t), where, Xj(t) and Xk(t) can
be either displacement or velocity at points GJ and GK, respectively, in the
directions of CJ and CK, respectively. For more information, please refer to the
OptiStruct Solver documentation. Note: Bulk Data Entry
|
| NOLIN3 | Defines nonlinear transient forcing functions of the form:
Pi(t)={S⋅[Xj(t)]A,Xj(t)>00,Xj(t)≤0,
where, Xj(t) may be a displacement or a velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry
|
| NOLIN4 | Defines nonlinear transient forcing functions of the form:
Pi(t)={−S⋅[−Xj(t)]A,Xj(t)>00,Xj(t)≤0,
where, Xj(t) may be a displacement or a velocity at point GJ in the
direction of CJ. For more information, please refer to the OptiStruct Solver documentation. Note: Bulk Data Entry
|
| NSGEADD | Defines non-structural material damping as the sum of the
sets listed Note: Bulk Data Entry
|
| NSMADD | Defines non-structural mass as the sum of the sets
listed. Note: Bulk
Data Entry
|
| PEAKOUT | Defines criteria used for the automatic identification of
loading frequencies at which result peaks occur. Other result output may then be
requested at these "peak" loading frequencies. This feature is only supported for
frequency response solution sequences. Note: Bulk
Data Entry
|
| PFAT | Defines element properties for fatigue analysis. Note: Bulk
Data Entry
|
| PFPATH | Defines a one-step transfer path analysis. Note: Bulk
Data Entry
|
| PRSPENE | Defines a pressure penetration load which can simulate fluid penetrating
through the surfaces on a contact interface. Note: Bulk Data
Entry
|
| PTADD | Defines a pretension load as a linear combination of load
sets defined via PTFORCE, PTFORC1,
PTADJST and PTADJS1 entries. Note: Bulk
Data Entry
|
| RANDPS | Defines load set power spectral density factors for use in
random analysis having the frequency dependent form Sjk
(F) = (X + iY) G(F). Note: Bulk
Data Entry
|
| RFORCE | Defines a static loading condition due to a centrifugal
force field. It can also be used to define the EXCITEID field
(Amplitude "A") of dynamic loads in RLOAD1,
RLOAD2, TLOAD1 and TLOAD2
Bulk Data Entries. RFORCE is used as a linear dead-load in Large
Displacement Nonlinear Analysis. Note: Bulk
Data Entry
|
| RSPEC | Specifies directional combination method, modal combination
method, excitation direction(s), response spectra and scale factors. Note: Bulk
Data Entry
|
| RSPEED | Specifies a set of reference rotor speed values for
asynchronous analysis in Rotor Dynamics. Note: Bulk
Data Entry
|
| SOLVTYP | Defines the solver type to be used for static, dynamic
analysis and geometric nonlinear implicit analysis. Note: Bulk
Data Entry
|
| SPCADD | Defines a single-point constraint set as a union of
single-point constraint sets defined via SPC or
SPC1 entries. Note: Bulk
Data Entry
|
| TABDMP1 | Defines modal damping as a tabular function of natural
frequency. Note: Bulk
Data Entry
|
| TABFAT | Defines y values of each point on the loading time
history. Note: Bulk
Data Entry
|
| TABLED1 | Defines a tabular function for use in generating
frequency-dependent and time-dependent dynamic loads. Note: Bulk
Data Entry
|
| TABLED2 | Defines a tabular function for use in generating
frequency-dependent and time-dependent dynamic loads. Also contains parametric data
for use with the table. Note: Bulk
Data Entry
|
| TABLED3 | Defines a tabular function for use in generating
frequency-dependent and time-dependent dynamic loads. Also contains parametric data
for use with the table. Note: Bulk
Data Entry
|
| TABLED4 | Defines the coefficients of a power series for use in
generating frequency-dependent and time-dependent dynamic loads. Also contains
parametric data for use with the table. Note: Bulk
Data Entry
|
| TABLEG | Defines a general tabular function for use in supported
reference entries. Note: Bulk Data Entry
|
| TABLEM1 | Defines a tabular function for use in generating
temperature-dependent material properties. Note: Bulk
Data Entry
|
| TABLEM2 | Defines a tabular function for use in generating
temperature-dependent material properties. Also contains parametric data for use
with the table. Note: Bulk
Data Entry
|
| TABLEM3 | Defines a tabular function for use in generating
temperature-dependent material properties. Also contains parametric data for use
with the table. Note: Bulk
Data Entry
|
| TABLEM4 | Defines coefficients of a power series for use in
generating temperature-dependent material properties. Also contains parametric data
for use with the table. Note: Bulk
Data Entry
|
| TABLEMD | Defines a multi-dimensional tabular function which
identifies single or multiple X-values for a single Y-value. Note: Bulk Data Entry
|
| TABLES1 | Defines a tabular function for use as stress-strain curve
in elasto-plastic material properties MATS1,
MATX33, MATX65, MATHF, as
well as material curve in nonlinear material properties MATX36,
MATX42, and MATX70. The
TABLES1 entry can also be used to define the corresponding
material curves on the MATHE Bulk Data Entry. Note: Bulk
Data Entry
|
| TABLEST | Specifies the material property tables for
elasto-plastic, temperature-dependent materials. Note: Bulk
Data Entry
|
| TABLEXN | Defines a tabular function for Stress (X) - Life (Y)
pairs to define an SN curve. Note: Bulk Data Entry
|
| TABRND1 | Defines power spectral density as a tabular function of
frequency for use in random analysis. Referenced on the RANDPS
entry. Note: Bulk
Data Entry
|
| TEMPD | Defines a temperature value for all grid points of the
structural model that have not been given a temperature on a TEMP
entry. Note: Bulk
Data Entry
|
| TICA | Defines values for the initial velocity of a set of grids
along and about an axis for explicit analysis. Note: Bulk
Data Entry
|
| TSTEP | Defines time step parameters for control and intervals at
which a solution will be generated and output in transient analysis. Note: Bulk
Data Entry
|
| TSTEPNL | Defines parameters for geometric nonlinear implicit
dynamic analysis strategy. Note: Bulk
Data Entry
|
| TSTEPNX | Defines additional parameters for geometric nonlinear
implicit dynamic analysis. Note: Bulk
Data Entry
|
| XHISADD | Defines a time history output set as a union of time
history outputs defined via XHIST entries. Note: Bulk
Data Entry
|
| XSTEP | Defines explicit analysis control. Note: Bulk
Data Entry
|
PAM-CRASH Cards
| Card | Description |
|---|---|
| ACC3D / | Imposed translational accelerations Note: Keyword input
|
| ACFLD / | Acceleration field Note: Keyword input
|
| ACTUA / | Joint Actuator Note: Keyword input
|
| BDFOR / | Body force cards Note: Keyword input
|
| BDFOR / AFIELD | Body force cards, KEYWORD = AFIELD: Acceleration field Note: Keyword
input
|
| BDFOR / VOLUME | Body force cards, KEYWORD = AFIELD: VOLUME: volumetric force Note: Keyword
input
|
| BDFOR / INPRES | Body force cards, KEYWORD = INPRES: Imposed pressure body force
type Note: Keyword input
|
| BDFOR / RADIAL | Body force cards, KEYWORD = RADIAL: Centrifugal force arisen from angular
velocity Note: Keyword input
|
| BDFOR / ROTACC | Body force cards, KEYWORD = ROTACC: Centrifugal force arisen from angular
acceleration Note: Keyword input
|
| BDFOR / PRSTRS | Body force cards, KEYWORD = PRSTRS: Bolt preload stress Note: Keyword
input
|
| BDFOR / PRFORC | Body force cards, KEYWORD = PRFORC: Bolt preload force Note: Keyword
input
|
| BDFOR /PREND | Body force cards, KEYWORD = PREND: Bolt preload end (Implicit
only) Note: Keyword input
|
| BOUNC / | Displacement Boundary Condition (Constraints) Note: Keyword
input
|
| CONLO / | Concentrated nodal load, force or moment vs. time or frequency Note: Keyword
input
|
| DAMP / | Nodal damping group (Time-Controlled Activation and Sensor-Controlled
Activation) Note: Keyword input
|
| DIS3D / | Imposed translational displacement Note: Keyword input
|
| DIS3DM / | Imposed minimum translational displacement Note: Keyword input
|
| DIS3DX / | Imposed maximum translational displacement Note: Keyword input
|
| INTEM / | Initial temperature, one or several nodes Note: Keyword input
|
| INVEL / | Initial velocity definition, one or several nodes Note: Keyword
input
|
| PFSURF / | Porous flow exchange surface Note: Keyword input
|
| PREFA / | Pressure boundary condition on solid, tetrahedral, shell and membrane
elements Note: Keyword input
|
| PREBM / | Pressure boundary condition on beams Note: Keyword input
|
| RAC3D / | Imposed rotational acceleration Note: Keyword input
|
| RAN3D / | Imposed rotational displacement Note: Keyword input
|
| RAN3DM | Imposed minimum angular displacement Note: Keyword input
|
| RAN3DX / | Imposed maximum angular displacement Note: Keyword input
|
| RDA3D / | RDA3D Note: Keyword input
|
| RDD3D / | RDD3D Note: Keyword input
|
| RDV3D / | RDV3D Note: Keyword input
|
| RVE3D / | Imposed rotational velocities Note: Keyword input
|
| TEMBC / | Imposed temperature Note: Keyword input
|
| VEL3D / | Imposed velocities Note: Keyword input
|
Permas Cards
| Card | Description |
|---|---|
| $ADDMODES | Definition of static mode shapes to be added to the set of eigenmodes used
for transformation to modal space. Note: Available as a load collector when the
source = loads.
To change the LPAT = field, set the AddmodeLoads toggle to LOADSELECT, which ensures that each data line will define different ADDMODES. In the NoOfLoads_AddMode = field, enter the number of load patterns to assign the ADDMODES to. |
| $CONTVAL | Assignment of properties to contacts referenced by contact identifier or
name. Note: Supported as a load collector (card image
LOADS). To create a card, use an existing load collector or create a new one
with card image LOADS and select the CONTVAL check box.
A maximum number of 5 keywords are allowed per load collector (load pattern). |
| $PRETENSION LOAD | Assignment of load properties to pretension threads/areas referenced by
identifier or name. Note: Supported as a load collector (card image LOADS). To create a card, use an existing load
collector or create a new one with card image LOADS and select the PRETENSION
checkbox.
|
| $SUPPRESS | Definition of suppressed degrees of freedom. The degrees of freedom given on the header line are suppressed for all nodes listed within the data block. |
Radioss Cards
Assign loads to a collector by creating individual loads, all of the same type and degree
of freedom, and storing them in the appropriate load collector, or by identifying the nodes
on which loads/BCs act by selecting them through a set. The selection of the set is possible
by editing the card image of the load collector.
| Card | Description |
|---|---|
| /ACTIV | Describes the deactivation/activation of element
groups. Note: Block
Format Keyword
|
| /SPH/INOUT | Describes the SPH inlet/outlet conditions. Note: Block
Format Keyword
|