Harmonic Load

Hey,


I'm new to COMSOL and I have a few questions about it.


I'd like to do a Frequency Response Analysis of a structure with a harmonic load ''shaking'' it with a pre-determined force and frequency , in which I can change it.

- How can I set a point in my structure to receive such a force.
- How can I set this force to act like a 'shaker' in a frequency


Thanks for your help.

Att.

Victor Soares