Reply To: Why does ansys repeat natural frequencies?

[Vigneswaran Sridharan]

Hi Both effective mass and participation factor are parameters that help the user to get an answer for questions like:
How many modes to extract?
Which modes are contributing to the problem?
Why do natural frequencies repeat in modal analysis?
I will recommend you to watch the course on Modal analysis available atModal Analysis | Ansys Innovation Courses.
This course has all the important background information for Modal analysis.
Vigneswaran