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How to solve linear static problem using PCG solver and output Stiffness matrix [K] to a result file

Hello,

I'm new to Altair's products and currently working on a linear static problem, Pre-processing in HyperMesh and Solving using Optistruct. I have two questions that I would appreciate some guidance on:

1. In the 2022 version of OptiStruct, the default solver is MUMPS. Could someone please guide me on how to change the solver to PCG?

2. Additionally, I need to output the stiffness matrix [K] to a file. Could you kindly advise me on the steps to do this?

Any assistance provided would be highly appreciated.

Thank you!

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OptiStruct

v2022

Accepted answers

you should create a load collector of type SOLVTYP.

then, call this load collector inside your Loadstep.

All comments

you should create a load collector of type SOLVTYP.

then, call this load collector inside your Loadstep.

Hi Anoop,

You can refer to this tutorial for model reduction.

https://help.altair.com/hwsolvers/os/topics/chapter_heads/superelements_tutorials_r.htm

You can control the format of superelement using card PARAM,EXTOUT

https://help.altair.com/hwsolvers/os/topics/solvers/os/param_extout_bulk_r.htm?zoom_highlight=dmigpch

Please check this article where we uploaded some demo files and a presentation regarding superelements.

Presentations & Webinars - OptiStruct Superelements Introduction and FAQ (altair.com)

Thanks.

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