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  1. rakeshsarma

    Generalized Modal Mass from NASTRAN

    Hello, Is there a way to obtain the generalized modal mass from NASTRAN without normalization. With MEFFMASS, I am able to obtain the modal effective mass, modal participation factors with respect to each mode for each direction. But is it also possible to obtain the generalized mass for each mode?
  2. rakeshsarma

    NASTRAN Effective modal mass

    Hello guys, I figured out the problem with help from MSC Tech Support. It is actually a limitation with the student edition. This command needs to be put through Direct text input and Patran does not write out direct text input in .bdf file for student version. However, the same file does work...
  3. rakeshsarma

    NASTRAN Effective modal mass

    Hi, Thank you for the reply. I tried your suggestion, but it does not work. I am using a student 2013 edition. Might that be the reason?
  4. rakeshsarma

    NASTRAN Effective modal mass

    Hello, I am doing a normal modes analysis of a 3D wing. I used a modified version of input bdf file from cfd4aircraft.com. The file is attached herewith. I want to output the effective modal mass participation in the .F06 file. I added the line "MEFFMASS(ALL) = YES" in the case control data...

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