# EDE

I/O Options and Subcase Information Entry Used to request element energy loss per cycle and element energy loss per cycle density output for all subcases or individual subcases, respectively.

## Format

EDE (format_list, type, dmig, group) = option

## Definitions

Argument Options Description
format <HM, H3D, PUNCH, OP2, PLOT, blank>
HM
Results are output in HyperMesh results format (.res file).
H3D
Results are output in Hyper3D format (.h3d file).
PUNCH
Results are output in Nastran punch results format (.pch file).
OP2
Results are output in Nastran output2 format (.op2 file). 8
PLOT
Results are output in Nastran output2 format (.op2 file) when PARAM,POST is defined in the Bulk Data section.
blank (Default)
Results are output in all active formats for which the result is available.
type <AVERAGE, AMPLITUDE, PEAK>
AVERAGE (Default) 7
In Frequency Response Analysis average energy is output.
AMPLITUDE
In Frequency Response Analysis the amplitude of energy is output.
PEAK
In Frequency Response Analysis the peak energy is output. This is the sum of AVERAGE and AMPLITUDE.
dmig <DMIG, NODMIG>
DMIG
Results are provided for external superelements in the .out file.
NODMIG (Default)
Results are not provided for external superelements in the .out file.
group <PROP, COMP, SET, OPROP, OCOMP, OSET>

Default = blank

PROP
Group damping energy based on property ID is output to the H3D and Punch files. This output is available in addition to the elemental damping energy output. 9
COMP
Group damping energy based on HM component is output to the H3D and Punch files. This output is available in addition to the elemental damping energy output. 9
SET
Group damping energy based on SET with Boolean operator OR is output to the H3D and Punch files. This output is available in addition to the elemental damping energy output. 9
OPROP
Only Group damping energy based on property ID is output to the H3D and Punch files. Elemental damping energy is not output. 9
OCOMP
Only Group damping energy based on HM component is output to the H3D and Punch files. Elemental damping energy is not output. 9
OSET
Only Group damping energy based on SET with Boolean operator OR is output to the H3D and Punch files. Elemental damping energy is not output. 9
option <YES, ALL, NO, NONE, SID>

Default = ALL

YES, ALL, blank
Element damping energy and damping energy density are output for all elements.
NO, NONE
Element damping energy and damping energy density are not output.
SID
If a set ID is given, element damping energy and damping energy density are output only for elements listed in that set.

1. When an EDE command is not present, element damping energy and damping energy density is not output.
2. Initial thermal strain is included in the calculation of element energy loss per cycle and element energy loss per cycle density.
3. Multiple formats are allowed on the same entry; these should be comma separated. If a format is not specified, this output control applies to all formats defined by the OUTPUT command, for which the result is available.
4. Multiple instances of this card are allowed. If instances are conflicting, the last instance dominates.
5. For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT.
6. type only applies to Frequency Response Analysis.
7. The three ways to calculate the Element Damping Energy in Frequency Response Analysis are:
Output Type
Formula
Average
${E}_{0}=\pi \omega \left({\mathbf{\text{u}}}_{r}^{T}{\mathbf{\text{C}}}_{E}{\mathbf{\text{u}}}_{r}+{\mathbf{\text{u}}}_{i}^{T}{\mathbf{\text{C}}}_{E}{\mathbf{\text{u}}}_{i}\right)$
Amplitude
${E}_{a}=\pi \omega \sqrt{{\left({\mathbf{\text{u}}}_{r}^{T}{\mathbf{\text{C}}}_{E}{\mathbf{\text{u}}}_{r}-{\mathbf{\text{u}}}_{i}^{T}{\mathbf{\text{C}}}_{E}{\mathbf{\text{u}}}_{i}\right)}^{2}+{\left({2\text{u}}_{r}^{T}{\mathbf{\text{C}}}_{E}{\mathbf{\text{u}}}_{i}\right)}^{2}}$
Peak
${E}_{peak}={E}_{0}+{E}_{a}$
Where,
$E$
Corresponding Elemental Energy
${u}_{r}$
Real Part of Displacement
${u}_{i}$
Imaginary Part of Displacement
${C}_{E}$
Elemental Damping Matrix
8. format=OUTPUT2 can also be used to request results to be output in the Nastran output2 format (.op2 file).
9. The group argument is only supported only for Static, Eigenvalue, Frequency response, Transient analysis and aeroelastic divergence analysis with H3D and PUNCH formats. Group Damping Energy and Group Damping Energy Density are available under the Element Damping Energy results type in the H3D file. In the Punch file, the Property/Component ID’s and the corresponding Damping Energy and Damping Energy Density are available.

If SET/OSET is requested a SID of Boolean set with operator OR is expected in the field option. Element SETs referenced when using this option should have the OPERATOR field set to OR. Regular element sets without Boolean OR are not allowed. SET/OSET is currently only supported for H3D and PUNCH formats.