Optimization using GA
Altair EmployeeHello everybody,
I am completely new to Hyperstudy and I try to optimize the fiber orientation.
For this purpose, I modeled a square plate with 4 elements. For the boundary conditions I fixed one edge in x and z direction and the adjacent edge in y and z direction to allow contraction. Now I put an enforced displacement of 1mm in x direction.
What I want to do is to give each element a random fiber angle and then to optimize them so that all of the 4 elements are rearranged in x direction.
In Hyperstudy I parameterize the .fem file to create the 4 design variables (fiber angles). To define the responses I tried to read out the scalar compliance value so that I can use it in HyperStudy but I haven't found a solution yet.
As an alternative I try to read out the minimum element strain energy using the resvector function and the .res file and then maximize it due to the enforced displacement. But I am not sure if this is the best solution.
If anybody has a solution, I would be glad.
As a contraint I limit the element stresses.
Another problem is that during the optimization HyperStudy seems to automatically create bounds for the responses like +-10% which will always be violated and thats why optistruct crashes that often.
Is there any possibility to delete or at least change these bounds?
Thanks in advance.
Answers
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In the optimization approach of HyperStudy, or the during the Setup approach phase, there is a step Select/Define design variables. You can change the bounds at this point.
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Hello,
I don't mean the design variables. During the evaluation bounds for the responses, e.g. bounds of +-10% of the initial compliance value from the nominal run are shown in the evolution and iteration plot , that I have never defined.
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