http://www.brown.edu/Departments/Engineering/Courses/En4/Notes/vibrations_forced/vibrations_forced.htm

or

https://petrowiki.org/Basic_vibration_analysis#Forced_vibration_with_damping

Hello Gordon Chirgwin

Your links do not address the vibration of beams.

Thank you for your suggestions.

Try this:

https://mafiadoc.com/free-and-forced-vibrations-of-a-timoshenko-beam_5a2893691723dd23a098ae97.html

Hello #Gordon Chirgwin

The suggested link addresses a forced vibration of an undamped Timoshenko beam.

I want info on a damped Euler-Bernoulli beam.

Thank you.