Doubts regarding Free Free analysis

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

I am doing a free free analysis i.e. performing normal mode without any constraints. I have observed that after first 6 rigid modes, model shows deformation. I want to know what causes this deformation? I mean if it is unconstrained then why at all it is deforming  

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Answers

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited March 2017

    Your analysis is correct. It's not really 'deformation' due to fixations & external loading, but you got different vibration modes.

     

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