Topology optimization error

Hi,

What type of analysis are you running?

Is it possible for you to share the .out file, please?

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

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?

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

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?

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?

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. 

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

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"?>

Thank you very much. How do I reach this menu ?

@frzti In HyperMesh goto Analysis page>> Interfaces>> Add