The square root of the variance can be used as a mode coefficient. The variance can be retrieved using the GET,,mode,N,mcoef command. See the sample input below. For those commands to work in Mechanical, you need to save the modal results and MAPDL database file (set the "Keep Modal Results" to Yes under the Analysis Settings and set the "Save MAPDL db" to Yes). resume /post1 *get,mcoef_3,mode,3,mcoef mcoef_3=sqrt(mcoef_3) /post1 set,1,3,mcoef_33 ! contribution of mode 3 to 3 sigma results /show,png plns,s,eqv
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