Reply To: How can we consider specific modes in modal analysis for expansion in MSUP RV?

[balaji.bp]

thanks for your reply,

as per your suggestion i made the changes in the code as given below,

antype,modal
modopt,lanb,20
SOLVE
FINISH
!
/SOLU
antype,modal,restart
mxpand,,,,YES,0.1,YES,EFFM,,
modseloption,yes,yes,yes,no,no,no,
SOLVE

as i told previously also that this code is working for modal analysis that means it expanding only those modes which are above significance threshold given in the code. But when i am running a Random vibration analysis its throwing same error as mentioned in last replies. I feel there some extra step i am missing which is required for RV analysis.