Transient analysis with modale superposition
Transient analysis with modale superposition
(OP)
hello there, i need to know how to proceed with a transient analysis based on modal superposition with the optimale modal base, i tried to select all the modal base witch contains 60 modes and the response of the system was exactly the response of a full transient analysis, however,when i wanted to select the optimale modal base depending on modes effectives masses (90% of total system mass) i tried with 'modseloption' and 'Mxpand' commands but i can't figure how to expand only the most significant modes PLEASE HELP.
you will finD attached an APDL script for my problem.
THANKS IN ADVANCE
you will finD attached an APDL script for my problem.
THANKS IN ADVANCE





RE: Transient analysis with modale superposition
mxpand,,,, yes,,, MODM !mode selection is based on the modal effective mass
modseloption,0.9 .90, 0.9,no, no,no, !direction X, Y and Z are selected, a minimum of 90% of the total mass is requested in this direction
RE: Transient analysis with modale superposition
my regards.
RE: Transient analysis with modale superposition