Journal
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
Volume 52, Issue 4, Pages 773-790Publisher
SPRINGER
DOI: 10.1007/s00158-015-1268-2
Keywords
Topology optimization; Gradual BESO; Multi-material design; Continuation approach; Soft-kill BESO
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Finding the optimum distribution of material phases in a multi-material structure is a frequent and important problem in structural engineering which involves topology optimization. The Bi-directional Evolutionary Structural Optimization (BESO) method is now a well-known topology optimization method. In this paper an improved soft-kill BESO algorithm is introduced which can handle both single and multiple material distribution problems. A new filtering scheme and a gradual procedure inspired by the continuation approach are used in this algorithm. Capabilities of the proposed method are demonstrated using different examples. It is shown that the proposed method can result in considerable improvements compared to the normal BESO algorithm particularly when solving problems involving very soft material or void phase.
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