Comparison of natural frequencies

[Torus86]

Hi,
I've done a nastran model of a simply supported plate that is identical to another model (same material, geometry and constraints).
I've performed modal analysis, but I found other values of frequencies.
Could someone help me to understand why?
Thank you very much!!!

 

[GregLocock]

How do the results compare with a hand calculation?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[Torus86]

For example my first natural freq (in Hz) is 8.4 and the right one is 11.28 Hz
I determined natural frequencies using matlab and I found the same values I have in the article that I'm studying. I think that I made some mistakes in the FE model but I didn't realize where yet..

 

[Torus86]

Dear Greg I found my mistake...
Thank you...