Non linear transient analysis

ketanpa
ketanpa New Altair Community Member
edited October 2020 in Community Q&A

Hello,

I am trying to perform nonlinear transient analysis of a plate. But I am getting the following error.

 

 *** ERROR # 4937 ***
 Nonlinear direct transient subcase 1 requires activation of LGDISP.

 

Could I know in which situations do we have to include LGDISP card?

 

Thanks in advance.

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2019

    Large Displacement (LGDISP) enables the recalculation of stiffness matrix to account for geometric nonlinearities. LGDISP can be applied globally or to a specific load case.

     

    Could you please share the .out file of the run?

  • ketanpa
    ketanpa New Altair Community Member
    edited July 2019

     

    Unable to find an attachment - read this blog

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2019

    Nonlinear Direct Transient Analysis: This solution sequence performs Large Displacement Nonlinear DirectTransient Analysis. 
    To activate large displacement use PARAM ,LGDISP, 1

    The predominant difference between NonlinearQuasi-static Analysis and Nonlinear TransientAnalysis is the inclusion of Inertia and Momentumterms in the solution of the Energy equation. 

  • ketanpa
    ketanpa New Altair Community Member
    edited July 2019

    Thanks a lot for your help.

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