Following a PSD/random vibration analysis, how can I get the contribution made to the 1-sigma value by just one mode?
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
*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