MODALDE

I/O Options Entry

MODALDE – Output Request

Description

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 that 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

Argument	Options	Description
format	<H3D, blank> Default = blank	H3D:	Results are output in Hyper3D format (.h3d file).
		blank:	Results are output in all active formats for which the result is available.

type	<AVERAGE, AMPLITUDE, PEAK> Default = AVERAGE	AVERAGE:	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> Default = ALL	ALL:	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.

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. See Results Output for information on which results are available in which formats.

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