type

<STRUCTURE or FLUID>

Default = STRUCTURE

STRUCTURE:

Requests output of structural modal participation factors.

FLUID:

Requests output of acoustic modal participation factors.

fmp

<ALL, N, NONE>

Default = NONE

ALL:

Participation factors will be computed for all calculated fluid modes.

N:

Number of fluid modes for which modal participation factors will be computed, based on the largest magnitude of modal contribution.

NONE:

Participation factors are not calculated for fluid modes.

smp

<ALL, N, NONE>

Default =
ALL (if type =STRUCTURE)

NONE (if type =FLUID)

ALL:

Participation factors will be computed for all calculated structural modes.

N:

Number of structural modes for which modal participation factors will be computed based on the largest magnitude of modal contribution.

NONE:

Participation factors are not calculated for structural modes (Comment 12).

setp

<ALL, NONE>

Default = NONE

ALL:

Output structural modal participation for each panel specified in the PANEL data.

NONE:

Do not output panel modal participation.

setf

<ALL, SID>

Default = ALL

ALL:

Participation factors are processed for all excitation frequencies.

SID:

Participation factors are only processed for a set of excitation frequencies. SID refers to the ID of a SET of type FREQ.

fratio

<REAL>

Default = 0.001

Specifies the value of a filter to be applied to the output. Values of modal participation below fratio times the displacement or pressure are not output.

ipower

<INTEGER>

Default = 30

When the magnitude of a modal participation is below 10 to the minus ipower, the modal participation will not be output. In other words, if the modal participation is less than 10-ipower, the result output for this mode will be skipped.

rval

<REAL>

Default = 0.0

The modal participation will be calculated at the excited frequencies when the magnitude of the response is above rval. The excitation frequency will be a subset of setf.

rpdba

<Non-Negative REAL>

Default = 0.0

RPDBACUT is the decibel pressure cutoff value for fluid responses, and is similar to RPCUTOFF. It will take precedence over RPCUTOFF for fluid responses. A weighting is applied to RPDBACUT values at the excitation frequency. The modal participation will be calculated when the magnitude of the response is about the cutoff value. See comment 9 for decibel calculations and reference pressure settings.

otype

<ALL, SYSTEM, CMS>

Default = SYSTEM

For SYSTEM, the output related to PFMODE will correspond to the whole model. Component modal participation will not be output by default. However, when using ALL or CMS, the component modal participation will be output. For the CMS option, there will not be system modal participation. Component modal participation can also be calculated for internal grids in the superelement.

seset

<ALL, SID>

Default = ALL

Component modal participation of all the H3D superelements will be output by default. However, a specific set of superelement names for output can be specified.

rtype

<DISP, VELO, ACCE>

Default = DISP

The Structural modal participation will be output for Displacement, Velocity or Acceleration, respectively based on the specified option (DISP, VELO, or ACCE).

outfile

<PUNCH, H3D>

Default = H3D

Modal participation can be exported either into the H3D file or PUNCH file. Because of the large volume of data, it is recommended to export the modal participation data into a H3D file.

PEAKOUT

If PEAKOUT is present inside the bracket of the PFMODE option, the filtered frequencies from the PEAKOUT card will be considered for the output of modal participation.

setdof/
PEAKOUT

<SID/PEAKOUT>

Degrees-of-freedom for which the participation factors are to be processed. SID refers to the ID of a SET of type GRIDC for structure participation and GRID for fluid participation. If PEAKOUT is specified instead of SID, the output will be considered at the filtered frequencies corresponding to the degree of freedom on the PEAKOUT card in the bulk section.