Problem with convergence

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

Hello,

 

i have a strange Problem during toplogy optimization. The Problem formulation is : minimize mass, displacement constraint 0,4mm. The optimization converged, but the displacement in the graph oscillate in a very high range. (see the attached pic)  And the displacement constraint is not respected by the solver.

 

what can i do to fix this?

 

Thank you very much

 

 

Regards

Andreas

 

<?xml version="1.0" encoding="UTF-8"?>2016-09-11 11_24_26.png

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited September 2016

    What is displacement for static analysis?If in static analysis displacement is .4 mm then giving displacement constraint of .4mm will not yield appropriate output.

    Give some relaxation value like if displacement is .4mm then give .8mm as displacement constraint.

    Otherwise give a try with Min compliance with Volfrac constraint. Share input file for better understanding of your problem.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2016

    Hi Andreas,

     

    Can you share the entire .out file?

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