Topology Optimizaiton variable penalty factor definition

Mehmet Demirtunc

Hi,

 

While appling the Topology Optimization, i want to define special relation between E/Eo and Density.

For example, SIMP method define the formulation as: E/E0 = (density)^penalty factor

My desire equation = E/E0 = a*(density)^4 + b*(density)^3 + c*(density)^2+d*density+e

To sum up, can i use polynomail function instead of SIMP relation for topology optimization ? 

 

Thanks you for attention.

Adriano A. Koga

hi,

 

as far as I know there's no way of adding your own equation concerning the penalty factor. Although this is a quite simple modification, it would be necessary to compute back all sensitivities of OptiStruct based on your penalty method, which is not feasible.

May I ask your application?

Depending on your model size, you should play with Compose to have more freedom in implementing these new formulations.

Here I've used the classic 99-lines TO in Compose.

https://community.altair.com/community?id=community_question&sys_id=bc76043a1b2bd0908017dc61ec4bcbee