Topology optimization error
Altair Employee
Hi All
I am getting this error in topology optimization data check :
Card 'WEIGHT' is not allowed for this subcase type
It's a 3D Solid problem with Wcomp and Volfrac, minimizing Wcomp and 0.3 Volfrac
Answers
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Hi,
What type of analysis are you running?
Is it possible for you to share the .out file, please?
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It's a static analysis with PSOLID elements topology optimization. I followed the steps of a youtube video, but the model is not this one. maybe more non linear geometry. But I need to know what does the error indicate
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Hi @frzti
How many load cases do you have in your model?
Could you please share the model file using the file transfer link available in my signature?
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It is one load case, static, applied to nodes on a line.what was not clear for me was the error text, what does subcase mean ?
I don't have the access to file to share it now
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Subcase is nothing but the load step. if you are running a simple linear static subcase it should support load weights.
Can you try with only compliance?
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what do you mean by load weight ?
also , does compliance that I see in theory differ from weighted compliance?
So you mean to remove the Volfrac variable?
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Load weight is the weight factor on applied load.
weighted compliance applies a weight factor on loadsteps. This will change the compliance.
Retain the volfrac and use compliance instead of Wcomp if you don't want to increase compliance by a factor.
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Thank you very much. Is there any article that I can read about compliance and weighted compliance ?
also , why is the contact definition in optistruct so generalistic ? without allowing me to choose the contact surfaces?
CONTACT 1 0.3 NORM
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Right now you can refer to help which has a little information abou compliance and weighted compliance.
Contact will allow you to choose contact surfaces as well. Make sure you choose CSurf as selector type.
<?xml version="1.0" encoding="UTF-8"?>
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Thank you very much. How do I reach this menu ?
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@frzti In HyperMesh goto Analysis page>> Interfaces>> Add
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