_s1.h3d File Iteration 0 Stress Interpretation

Merula_20758

Hello guys,

 

what exactly is the first (0) Iterations stress contour plot? It differs from the stress output you get when doing an analysis.

I am aware, that the topology optimization solver sets the density value euqally distributed over all elements to some start value which is 0.3 I think. But then I would expect to see 3 times the stress in an linear optimization (Iteration0) compared to a linear analysis?

 

Thanks in advance.

Best regards,

 

Merula

Altair Forum User

Hi @Merula

The material used depends on responses. 

for example

The volfrac in first iteration is either 0.9 or 0.6, depending on whether mass is objective or not. The first iteration will be same as analysis results only if the volfrac = 1.0. To get that, set MATINIT = 1.0. Then the results between first iteration should match that of previous analysis.