USE dresp3 to sum up element stress component as a external response for topology optimization

Jiaxin ZHOU

Dear developers and users,

I need to use the sum of stress component Sigma11 over each elements as objective function.

The thing is I have a model with a fine mesh so I can not use DRESP2.

I think I need to creat my own external response using DRESP3 instead.

Is it possible to callout stress component Sigma11 of each element? And is it possible to sum up the value to creat my own response? If YES, Is there any similar OML file could be provided as an example?

Any insights would be appreciated.

Thank you

 

 

 

Xiaolei

Hi Jiaxin, 

Is it a dynamic analysis or a static?  

I am thinking even if OML files is used like the method described in this tutorial( https://2023.help.altair.com/2023/hwsolvers/os/topics/solvers/os/size_optimization_external_response_r.htm), you still need to pass stress responses of each element to OML and to combine, which is not easier than using DRESP2 avg function.  If you have hundreds or thousands elements, then you want to use a scripts to create the response and the function. 

 

Besides the method you mentioned, do you want to consider the below?

1. Minmax(stress responses of multiple elements)

2. Minimize compliance

 

Thanks. 

Xiaolei