MODALDE

I/O Options and Subcase Information Entry The MODALDE command can be used above the first SUBCASE or within a SUBCASE definition to request modal damping energy (the energy loss per cycle) output for all subcases or individual subcases, respectively.

Note: This modal damping energy only includes the energy contribution from viscous dampers. Structural damping and modal damping are not included.

Format

MODALDE(format_list,MODES=mset,TYPE=type) = option

Definitions

Argument Options Description
format <H3D, blank>
H3D
Results are output in Hyper3D format (.h3d file).
blank (Default)
Results are output in all active formats for which the result is available.
type <AVERAGE, AMPLITUDE, PEAK>
AVERAGE (Default)
The average of the energy is output.
AMPLITUDE
The amplitude of the energy is output.
PEAK
The peak energy is output. This is the sum of AVERAGE and AMPLITUDE.
mset <ALL, SID, TOTAL>
ALL (Default)
Modal energy is output for all modes.
SID
If a set ID is given, modal energy is output only for modes listed in that set.
TOTAL
Only the total energy is output.
option <YES, ALL, NO, NONE>

Default = ALL
YES, ALL, blank
Modal energy is output for all modes.
NO, NONE
Modal energy is not output.

Comments

  1. When MODALDE command is not present, modal damping energy is not output.
  2. Modal damping energy output is only available for Modal Frequency Response Analysis.
  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. This modal damping energy only includes the energy contribution from viscous dampers. Structural damping and modal damping are not included.