A new topology optimization scheme for nonlinear structures

다국어 초록 (Multilingual Abstract)

A new topology optimization algorithm based on artificial bee colony algorithm (ABCA) was developed and applied to geometricallynonlinear structures. A finite element method and the Newton-Raphson technique were adopted for the nonlinear topology optimization.

The distribution of material is expressed by the density of each element and a filter scheme was implemented to prevent a checkerboardpattern in the optimized layouts. In the application of ABCA for long structures or structures with small volume constraints, optimizedtopologies may be obtained differently for the same problem at each trial. The calculation speed is also very slow since topology optimizationbased on the roulette-wheel method requires many finite element analyses. To improve the calculation speed and stability ofABCA, a rank-based method was used. By optimizing several examples, it was verified that the developed topology scheme based onABCA is very effective and applicable in geometrically nonlinear topology optimization problems.

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