Following a PSD/random vibration analysis, how can I get the contribution made to the 1-sigma value by just one mode?
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It would not include the contribution the mode makes through coupling with other modes, but to see the contribution from mode 7 itself the commands would be: !!! Following the PSD analysis /POST1 *GET,Q77,MODE,7,MCOEF ! Variance of mode 7 Q7=SQRT(Q77) ! 1 sigma is the sqrt of variance SET,1,7,Q7 ! Apply Q7 as a factor on the modal results !!! Postprocess as usual |
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