CBUSH Doesn't Constrain Model in Modal Analysis

Altair Forum User
Altair Forum User
Altair Employee
edited November 2020 in Community Q&A

I have a model with an RBE3 constraint at the hole connected to a CBUSH element. I run a modal analysis, but I don't see the model constrained at all with the CBUSH element and I see rigid body modes still even though the CBUSH element should constrain it? . 

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  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2016

    Hi @sch

     

    I don't see any constraints or loads in your model. Please check and update.

     

    For the first subcase I only see first six modes as rigid.

    <?xml version="1.0" encoding="UTF-8"?>sch.PNG

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