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  1. JohnSmith54545

    WTMASS and Eigenvalue in FEMAP/NASTRAN

    Hi I want to get the eigenvalues of an Objekt with FEMAP/NASTRAN. In FEMAP I can choose to change the WTMASS. Is it necessary? What is it exactly for? I have tested it with an easy spring-mass-system and I only get to a right answer, if i haven't picked it. Thanks for your help

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