FEA Re-analysis of topology optimisation

Altair Forum User

Good Evening,

 

I have completed a topology optimisation and I am happy with results but now I want to to re-run the analysis.

 

I open ossmooth, load the model and results, use 'keep smooth layer around' and remesh using a 'mixed' mesh type.

 

I then go to run the analysis (-optskip) and I get an error message regarding compliance.

 

I don't understand what's causing this as the loads and constraints are all attached to the non design space. Is it a mesh issue?

 *** WARNING #  312
 In static load case            1
 the compliance is negative or large   3.974381E+11
 Optimization/buckling analysis cannot be performed
 due to possible rigid body mode

 *** WARNING #  312
 In static load case            2
 the compliance is negative or large   1.253294E+12
 Optimization/buckling analysis cannot be performed
 due to possible rigid body mode

 

Thanks in advance for any help, this forum is an excellent resource and has got me this far. I just need a little help with this last step.

 

Kind Regards,

 

Mike

 

 

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

Unable to find an attachment - read this blog

Rahul Rajan_21763

Hi,

 

This is usually because of incorrect or insufficient BC's, Model not being connected properly with other components, incorrect model units etc.. 

 

Regards

Rahul R