Erik Kostson
Ansys Employee
Hi Rahat

Rotordynamics is a whole area which one can specialise in and I do not have the full background.

Having said that, we can do rotordynamics like you mentioned looking at campbell diagrams and so on.
(see manual for more info)
Unfortunately we do not have a course for students here on this portal (we have for harmonic and modal and other subjects that might be of interest).

Our ansys learning hub, has a roytor dyn. course, see that if you have a subscription.

Finally on the internet there is some material that might give you an idea - from my limited experience one typically/often can have on the out of balance force as excitation on rotating machines (so out of balance mass * radius * angular freq. squared so centrifugal force).
Hope this helps

Erik