# .effmass file

The .effmass file is an OptiStruct ASCII format results file.

## File Creation

This file is created when MEFFMASS with TYPE = COMP or PROP or SET = ID is used.

## File Contents

This file contains the modal participation factor, modal participation factor ratio, modal effective mass, and modal effective mass fraction values.

• When TYPE of COMP is used, the output is printed to this file based on HyperMesh components.
          Component <HyperMesh_component_name>

MODAL PARTICIPATION FACTORS FOR SUBCASE    <subcase_ID>
. . .
MODAL PARTICIPATION FACTORS RATIOS FOR SUBCASE    <subcase_ID>
. . .
MODAL EFFECTIVE MASS FOR SUBCASE       <subcase_ID>
. . .
MODAL EFFECTIVE MASS FRACTION FOR SUBCASE       <subcase_ID>
. . .  
• When TYPE of PROP is used, the output is printed to this file based on property ID.
Property        <property_ID>

MODAL PARTICIPATION FACTORS FOR SUBCASE   <subcase_ID>
. . .
MODAL PARTICIPATION FACTORS RATIOS FOR SUBCASE   <subcase_ID>
. . .
MODAL EFFECTIVE MASS FOR SUBCASE       <subcase_ID>
. . .
MODAL EFFECTIVE MASS FRACTION FOR SUBCASE       <subcase_ID>
. . .
• When TYPE of SET = ID is used along with a suitable MEFFSET definition, the output is printed to this file based on the HyperMesh set name.
 Element Set        <HyperMesh_set_name>

MODAL PARTICIPATION FACTORS FOR SUBCASE   <subcase_ID>
. . .
MODAL PARTICIPATION FACTORS RATIOS FOR SUBCASE   <subcase_ID>
. . .
MODAL EFFECTIVE MASS FOR SUBCASE       <subcase_ID>
. . .
MODAL EFFECTIVE MASS FRACTION FOR SUBCASE       <subcase_ID>
. . .

## Comments

1. When SET = ID is used, the output header for each set uses the HyperMesh set name by default. When set name is not specified in the input file, the set ID is specified.
2. For more details, refer to MEFFMASS and MEFFSET documents.