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I used a lot of modes, but Mass Participation is still very low. Any thoughts?

Question asked by Jeremiah Hess on May 13, 2019
Latest reply on May 15, 2019 by Bill McEachern

For this support component, I wanted to perform a modal analysis to see what the natural frequencies were at the relevant modes. I started off being choosing 15 modes. Then, I increased it to 50 when the mass participation was still very low. I'm up to several hundred modes and I can't get the MP past about 40%.

 

Any thoughts on this? Is it possible that I'm setting up something wrong? Attached is the model and the natural frequencies for the first few modes.

 

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