normal mode analysis in patran
normal mode analysis in patran
(OP)
I am doing normal mode analysis in MSC-PATRAN using MSC- NASTRAN.my 1st elastic frequency(7th mode in free body analysis) and 1st elastic frequency(1st mode with constrained model) is not equal.
7th mode freq with free body analysis =1847hz.
1st mode freq with constrained model analysis =647 hz.
what is the error/problem.
hw to correct it.
Thanks in advance.
7th mode freq with free body analysis =1847hz.
1st mode freq with constrained model analysis =647 hz.
what is the error/problem.
hw to correct it.
Thanks in advance.





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