Error # 4966

jerometeoh
jerometeoh Altair Community Member
in Community Q&A

Help, I am attaching an .out file.

Wondering what are the changes I should make to my model to see possibly solve it.

fpsim27.out

Thanks,

Jerome

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  • loistf
    loistf Altair Community Member
    Answer ✓

    I was just paraphrasing the out file. There is a warning / note about "zero static load vector". I have a "wild" guess. What do your linear-static results look like? Are the stress zero or very small? Does the deformed shep look like rigid-body motion?

Answers

  • loistf
    loistf Altair Community Member

    Hi. Something might be ill-defined on the loads side. Do you recognize the message about zero static load vector? Is that consistent with what you have defined?

    I would suggest running a linear static case (if you haven't done it before) and check if the results give you any clue about the nonconvergence.

    Hope it helps

  • jerometeoh
    jerometeoh Altair Community Member

    Thank you Loistf.

    What do you mean about zero static load vector? For loading, I used enforced displacement load to my structure in compression.
    I did ran a linear static case, and looks like it solve.

  • loistf
    loistf Altair Community Member
    Answer ✓

    I was just paraphrasing the out file. There is a warning / note about "zero static load vector". I have a "wild" guess. What do your linear-static results look like? Are the stress zero or very small? Does the deformed shep look like rigid-body motion?

  • jerometeoh
    jerometeoh Altair Community Member

    Loisf,

    Here is a snapshot how it looks like. Its a composites part.

    image.png
    fpsim27_linear.out

  • loistf
    loistf Altair Community Member

    That was not it then :). Did you see anything in the _nl.out file? Any clue there?

  • jerometeoh
    jerometeoh Altair Community Member
    fpsim27_nl.out

    Loistf,

    I am pretty new to nl analysis, so i attach the nl out here to see if you see anything.

    I think it is because the cutback reach?

  • loistf
    loistf Altair Community Member

    Mmm, unexpected.. If I were in your situation, I would try to run some nonlinear model that is somewhat close to equivalent or similar and see if that converges some increment.

    For example, extracting the loads from the linear analysis and apply those loads instead of the enforced displacements in the nonlinear one. Also, trying tension instead of compression enforced displacements, etc. All this to try to find clues on what is the source for nonconvergence.

  • jerometeoh
    jerometeoh Altair Community Member

    Thank you Loistf. This is a great suggestions!

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