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, SUBSYS=SUBSYS_ID) = 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, INCL, OINCL> 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 INCL Group damping energy based on INCLUDE files is output. 10 OINCL Only group damping energy based on INCLUDE files is output. Elemental damping energy is not output. 10
`SUBSYS`	<`SUBSYS_ID`> No default	ID of the subsystem. When used along a subsystem definition, this option generates an individual result file for each subsystem with results for that subsystem only. For more information, refer to the SET Bulk Data Entry.
`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.

Comments

When an EDE command is not present, element damping energy and damping energy density is not output.
Initial thermal strain is included in the calculation of element energy loss per cycle and element energy loss per cycle density.
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.
Multiple instances of this card are allowed. If instances are conflicting, the last instance dominates.
For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT.
type only applies to Frequency Response Analysis.
The three ways to calculate the Element Damping Energy in Frequency Response Analysis are:

Output Type

Formula

Average

$E_{0} = π ω (u_{r}^{T} C_{E} u_{r} + u_{i}^{T} C_{E} u_{i})$

Amplitude

$E_{a} = π ω \sqrt{{(u_{r}^{T} C_{E} u_{r} - u_{i}^{T} C_{E} u_{i})}^{2} + {({2 u}_{r}^{T} C_{E} u_{i})}^{2}}$

Peak

$E_{p e a k} = E_{0} + E_{a}$

Where,

$E$

Corresponding Elemental Energy

$u_{r}$

Real Part of Displacement

$u_{i}$

Imaginary Part of Displacement

$C_{E}$

Elemental Damping Matrix
format=OUTPUT2 can also be used to request results to be output in the Nastran output2 format (.op2 file).
The group argument is only supported only for Eigenvalue, Frequency response, 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.
Element Damping Energy is grouped and output for each INCLUDE file in the model. This is supported for linear static analysis, normal modes analysis, complex eigenvalue analysis, and frequency response analysis. It is supported for both H3D and PUNCH outputs. The corresponding elements in each include file in the model are automatically collected as element SETs of SUBTYPE=PROP where applicable and SUBTYPE=ELEM otherwise. These internally created element SETs are saved in the <filename>_sets.fem file which can be used for review. The SETs are named based on the name of the include file.