extracting Matrices from Nastran Modal analysis
extracting Matrices from Nastran Modal analysis
(OP)
Hi everyone,
I need help
1) punch damping matrix
2) For Ground Vibration Test, I need to apply excitation force to the wing. How to model excitation force in Patran/Nastran?
3) how to get Mass matrix from modal analysis, I can get unit mass matrix, I need a mass for each mode for given plate.
4) Need to generate IRF( impulse response matrix), any idea from Nastran?
Many thanks in advance,
VK
I need help
1) punch damping matrix
2) For Ground Vibration Test, I need to apply excitation force to the wing. How to model excitation force in Patran/Nastran?
3) how to get Mass matrix from modal analysis, I can get unit mass matrix, I need a mass for each mode for given plate.
4) Need to generate IRF( impulse response matrix), any idea from Nastran?
Many thanks in advance,
VK





RE: extracting Matrices from Nastran Modal analysis
for the mass matrix generation (in your f06 file), you have to add this line in your bdf
MEFFMASS(ALL)=YES
Regards,
SN
Seif Eddine Naffoussi, Stress Engineer
www.Innovamech.com
33650 Martillac – France