Is PARAM, EXPERTNL supported for Large Displacements?

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

Hi all,

I read in the Altair ebook 'Introduction to Nonlinear FEA using Optistruct' (free ebook for students) that EXPERTNL is currently not supported with large displacement nonlinear analysis. As this ebook is from 2018 I wanted to ask, if things have changed since? Is EXPERTNL supported with large displacement analysis in the 2019 Version of OptiStruct?

I am working on a nonlinear analysis with large displacements at the moment and am running into convergence issues and thought setting PARAM, EXPERTNL to YES might do the trick. I had a look in the online help of the 2019 Version but it only states that this parameter 'activates nonlinear expert system to aid in the convergence of small displacement nonlinear problems.

Can somebody help me with this question?

 

Kind regards,

 

cfuser

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Answers

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

    Currently description only talks about small displacement for this feature.But PARAM, EXPERTNL, YES applies to LGDISP as well.

     

  • cfuser
    cfuser Altair Community Member
    edited October 2019

    Thank you, Sir!

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