Creo Simulate > Creating Analyses > Vibration Analysis > Modes Included
  
Modes Included
Use this item to specify which modes from the modal analysis you want included in the dynamic analysis. You can specify this in two ways:
All—Select if you want to include all modes from the modal analysis in the dynamic analysis.
Below Specified Frequency—Select to limit the modes included. Enter a frequency in the entry box.
Return to Mode Options for Dynamic Analyses or To Select Mode Options for a Dynamic Analysis.