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mikeyh

FEA Re-analysis of topology optimisation

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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

 

 

post.JPG

FRONT LOWER LEFT MODEL 2127.out

FRONT LOWER LEFT MODEL 2127.hm

FRONT LOWER LEFT MODEL 2127.fem

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Hi Rahul,

 

Thanks for your response :)

 

I believe it was caused by the connection between the design and non design space after optimisation, I'm not sure though!

 

Thanks,

 

Mike

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