Reply To: PSD (random vibration) and Acceleration on a body (harmonic response)

[dlooman]

Yes, that's a common scenario which isn't supported by the Mechanical Gui.  With APDL commands you could use a force psd applied to the motor.  The harmonic analysis could be done in Mechanical.  If Mechanical doesn't allow acceleration to be scoped to a body you can apply it with a commands object:  CMACEL,named_selection,Xacel,Yacel,Zacel where a named selection has been created for the motor body in the gui.