Step 79 - Topology Optimization

[Sou Ren]

Hey there,

I looked at tutorial 79 dealing with topology optimization and the tutorial mentions that step 79 deals with elastic isotropic material and at the end presents a case study in 2D.

Is 3D case already considered in this module? and also is it possible to deal with high  resolution large scale topology optimization cases?

Or for above mentioned cases one should extend and develop step 79?

Thanks a bunch.

[Justin O'Connor]

Howdy!

The step-79 program uses simultaneous analysis and design (SAND) as well as second derivative information to solve this 2d problem. Most people doing large scale, 3d problems today use only first derivative information and sensitivity analysis in a nested analysis and design (NAND) context. This is because while SAND and second derivative information both allow a topology optimization program to be more robust, they also rely on a much larger system of equations. 

As it is written now, the step-79 program would not work well for a 3d case, especially for high resolution. The common way to solve such a problem now would be with an "optimality criteria method" or similar.

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