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MATINIT ignored

Hey,

I'm using OptiStruct as solver and I want to do a topology optimization. The initial mass is about 2.9xx tons, I'm using a a MATINIT parameter of 0.3. The solver is obviously ignoring it. After the first iteration the solver is still using 2.9xx tons.

What is going on here? Why is the parameter ignored?

Thank you!

Galerkin

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Rahul Rajan_21763

Hi,

Please see the attached screenshot from Optistruct Frequently asked question.

Regards

Rahul R

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi Raul,

thank you! I did exactly what the 'how can I assign material fraction' FAQ is recommending. I don't see how this is helping, MATINIT in DOPTPRM is set to 0.3. What do you mean exactly?

Best regards,

Galerkin

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