Static Analysis - Weighted Compliance

arh423
arh423 Altair Community Member
edited October 2020 in Community Q&A

Hey,

 

how can I output weighted compliance in static analysis?

Did I need to activate it in control cards or something? Can't find it.

 

Thank you!

Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited September 2020

    Hi,

     

    Weighted compliance is an optimization output only.

    You can build a 'dummy' optimization, and force zero iterations to calculate it, under opti controls. Then the weighted compliance will be computed.

     

    Another option is taking the values and go to excel to calculate it.

  • arh423
    arh423 Altair Community Member
    edited September 2020

    Hey,

     

    thank you!

    Which value for exel do you mean?

     

    Thank you!

  • arh423
    arh423 Altair Community Member
    edited September 2020

    Found this in .out-file without chaniging anything:

     Subcase   Compliance     Epsilon
           1  6.481120E+02 -2.015214E-10
           2  5.686093E+02 -5.914374E-10
           3  6.476533E+02 -1.777104E-10
           4  5.686258E+02 -6.589830E-10

     

    Can I just sum up to get weigthed compliance here?

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited September 2020

    i should have een more specific. Yes, taking the compliance values from the .out file was my suggestion.

     

    WCOMP is just

     

    WCOMP = sum(wi * Ci), with i=1...number_loadcases

     

    If your weighting factors are all 1.0, then just sum all the compliances. Otherwise, multiply by its weighting factor and sum-up.

  • arh423
    arh423 Altair Community Member
    edited September 2020

    Thank you!

    Is the Compliance in Nmm?

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited September 2020

    yes. Compliance has units of Force*displacement.