I am analyzing the modal response of a structural FEM for a spacecraft structures course. I'm using Solidworks Simulation Premium. Need first mode to be above 40Hz and the damping Q-factor (quality factor) to be >=10.

I have had some trouble finding consistent nomenclature and information about the Q-factor on the web, but in case some one else has this question, but a few sources that I found to be at least partially helpful are as follows:

  1. https://vru.vibrationresearch.com/lesson/q-factor/#:~:text=The%20Q%2Dfactor%20measures%20the,harder%20it%20is%20to%20control.
  2. https://en.wikipedia.org/wiki/Q_factor
  3. https://faculty.uml.edu//pchowdhury/PHYS2690/Supp/Q-factor.pdf

I found number 3, in particular to be helpful.

So the question is this: how can one get modal response peaks out of solidworks sim premium to estimate the Q-factor of a structure with the resonant peak frequency / half power bandwidth equation? (see 1 and 3)?

$Q=\frac{Resonant Peak [Hz]}{Half power bandwidth [Hz]}$

This may be a bit of a over-simplistic question, but I really appreciate inputs here.

Thanks! -Dave



1 Answer 1


Linear FEA doesn't include damping. You need to explicitly add damping after you've got your FEA results. Typically this is done as a proportion of the mass or stiffness matrix. This is of course a lousy way to model a complex system.

I'm baffled why you'd want high Q in a structure.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.