Optimize material properties for PSOLID

Neil Hall
Neil Hall Altair Community Member
edited May 2023 in Community Q&A

Hi,

I would like to optimize the material properties for a PSOLID with a MAT1 material (i.e., E, RHO, GE).  For example, I have a solid bar of dimensions 1 x 1 x 1 inch.  I want the frequency to be  4000Hz.  Instead of changing the size, I want to solve for the MAT1 properties that would yield the 4000Hz.  I have tried to use the DESVAR, DVPREL, and DDVAL functions, but it seems that those want to work with PSHELL, not PSOLID.

My model is attached.  It is basically a SDOF mass spring system that is fully constrained on one end and constrained in all DOFs except X on the opposite end.  I give it an initial condition Xo = 0.25 inch.  It runs a direct transient analysis.

Thanks,

Neil Hall, Callaway Golf, 760-822-4794

 

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited May 2023

    PSOLID does not allow you to change anything in particular.

    But MAT1 can be changed, for sure (E, rho, poisson,...). It uses a parametric optimization for DVMREL. (material).

    For spring elements CBUSH, we could optimize the stiffness and damping properties, for example.

     

     

     

     

  • Lamster
    Lamster New Altair Community Member
    edited May 2023

    The way I would do it... 

    Open hyperstudy, on define models select "Parameterized file" and select your fem. It'll ask if you want to create a parameterised file (say yes). It'll then open a word file, scroll down to the parameters you want to set (so E, rho etc) to a range of values. 

    Then set up your studies with a target frequency of 4kHz with some desired constraint. 

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