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  1. Example
  2. Structural
  3. Optimization

evolutionary structural optimization

PreviousOptimizationNextIsogeometric Analysis

Last updated 3 years ago

In this example, the optimization of a loaded panel is performed by using the BESO method. The model can be downloaded .

Design Domain

The design domain has a dimension of 100×40100\times40100×40 with left side fully fixed. At the center of the right side, a point load is applied. The panel is discretized with 400040004000 CP4 elements.

The node and elements are defined in files node.supan and element.supan. They can be loaded.

file node.supan
file element.supan

The boundary condition is applied to a group that selects all nodes on x=0x=0x=0.

generatebyrule nodegroup 1 1 1. 0.
groupmultiplierbc 1 P 1

The Optimization Step

To perform structural optimization, a step needs to be defined.

step Optimization 1

To define a proper rule to update the model by adding/deleting elements, one can use the criterion. The following command defines a strain energy based evolution rule with an increment step of 2%2\%2% to reach the final design level 50%50\%50%, that is to remove 50%50\%50% elements.

criterion StrainEnergyEvolution 1 2 50 1 1 40

Result

here
Optimization
StrainEnergyEvolution
optimization