Learning Forum

[Luis]

Hello everyone,

I was wondering why in the modal analysis module I have the possibility to insert loads (such as rotational velocity etc.) even though in this kind of analysis they aren't taken into account. 

Thank you

Luis

[Rohith Patchigolla]

Luis,

Rotational velocity load is used in Modal analysis to include the gyroscopic effects. 

From Help:

For a rotating structure or machine component, the gyroscopic effects resulting from rotational velocities are introduced into the modal system. These effects change the system's damping.

For a Modal Analysis, Rotational Velocity is valid only when the following Analysis Settings properties are specified:

• 
  

  Damped is set to Yes in the Solver Controls group.

  
  


• 
  

  Coriolis Effect property is set to On in the Rotordynamics Controls group.