Mass Participation (Normalized)

You can list mass participation ratios in the global X, Y, and Z directions normalized with respect to the total mass after running a frequency study.

Mass participation ratios are important in determining the adequacy of the calculated modes to solve dynamic problems with base motion. Many codes require that at least 80% of the mass of the system participates in specified directions.

To access this PropertyManager, after you run a frequency or linear dynamic study, right-click Results folder and select List Mass Participation.

Study name Displays the name of the active frequency study.
Mode No. Displays a list of mode numbers.
Freq (Hertz) Lists the resonant frequencies in Hertz.
X direction Lists the mass participation ratios in the global X direction for each mode.

Variable SumX stores the sum of all mass participation ratios in the X direction.

Y direction Lists the mass participation ratios in the global Y direction for each mode.

Variable SumY stores the sum of all mass participation ratios in the Y direction.

Z direction Lists the mass participation ratios in the global Z direction for each mode.

Variable SumZ stores the sum of all mass participation ratios in the Z direction.

Save Saves the list as an Excel file (*.csv) or as a Plain text file (*.txt).