DOF restriction issues in multi-step analyses with connectors

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  • Abio
    Junior Member
    • Aug 2019
    • 1

    DOF restriction issues in multi-step analyses with connectors

    Hey all,

    I'm using rigid cylindrical joint connectors in my models and recently recognized a problem with my DOF restrictions.

    I made a small example model to show my problem.

    In the .feb file I'm applying a force on the bottom cube and rotating it at the same time across both step1 and step2. That works just fine. But now if you try to restrict the rotation during step2, no rotation happens through the whole simulation, including step1.

    This also happens with displacements etc., the DOF restrictions of the last step overwrite the less restricted previous ones.

    Am I missing something?

    Best regards
    Alex
    Attached Files
  • ateshian
    Developer
    • Dec 2007
    • 1824

    #2
    Hi Alex,

    Substitute the fixed rigid body DOFs with prescribed DOFs where the prescribed value is zero. Let me know if that does not fix the issue.

    Best,

    Gerard

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