Non Linear analysis

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi,

I have to solve non-linearly the loads applied on a blade of a windmill using Hypermesh as the pre proc and Nastran. Can anybody tell me what cards to select, how to give iterations, etc etc. I have heard solving a problem Non linearly is totally different from linear analysis. Please help

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2011

    Hi,

    I have to solve non-linearly the loads applied on a blade of a windmill using Hypermesh as the pre proc and Nastran. Can anybody tell me what cards to select, how to give iterations, etc etc. I have heard solving a problem Non linearly is totally different from linear analysis. Please help

    is it implicit or explicit? could you give some more information about your analysis?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2011

    You need to determine what makes this problem non-linear. It could be large displacements, materials that are stretched outside their elastic range, or a non-linear application of loads. Think of non-linear analysis as involving something that is not instantaneous. Look into the parameter card NLPARM and the material card MATS1 which references both a MAT1 material and a TABLES1 card which holds points on a non-linear stress-strain curve. The loadcase will need to reference the NLPARM card.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2011

    is it implicit or explicit? could you give some more information about your analysis?

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