Rigid Elements

gopal_rathore
gopal_rathore Altair Community Member
edited October 2020 in Community Q&A

Hi,

Is there any difference between rbody and rbe2 element  in radioss. Both of them belong to family of rigid elements and for rbody we have option for providing mass and inertia which I think is not there in rbe 2 element. Also which is generally used for providing the connections like weld etc. in an assembly.

One more thing is how to go for making a global rigid body from a multiple rigid bodies. As this causes node dependency, kindly let me know about the technique for making the same. Also how to provide a sensor or rbody off for based on any time condition.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2016

    Rigid bodies can be activated or deactivated with the options /RBODY/ON and /RBODY/OFF in the Engine files.

    For eg, to activate a rigid body with the master node 1, add the following option in the engine file (xxxx_0001.rad):

     

    /RBODY/ON

    1 

    To deactivate one rigid body whose master node ID is 3, add:

    /RBODY/OFF

    3

    In this case, all elements are reactivated, strains and stresses are those from previous deactivation time.

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited May 2016

    Hi,

    Thank you for your answer. Rbody activation has been done based on the above method. Kindly let me know about the first part of the question.

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited May 2016

    Hi,

     

    In Optistruct user profile you would find RBE2 naming  for Rigid element whereas in Radioss user profile you would find name as Rbody.In Radioss Ebook we talk about Rbody in detail.

     

    Regards

    Rahul R

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