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Sep 28, 2022;12 (1): 16185.

Inequality constraint on the maximum genus for 3D structural compliance topology optimization.

Haitao Han, Chong Wang, Tongxing Zuo, Zhenyu Liu
Author Information
  1. Haitao Han: Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, 130033, China.
  2. Chong Wang: Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, 130033, China.
  3. Tongxing Zuo: Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, 130033, China.
  4. Zhenyu Liu: Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, 130033, China. liuzy@ciomp.ac.cn.
PMID: 36171435 DOI: 10.1038/s41598-022-20248-x

Abstract

Structural topology constraints in topology optimization are an important research topic. The structural topology is characterized by the topological invariance of the number of holes. The holes of a structure in 3D space can be classified as internally enclosed holes and external through-holes (or tunnels). The genus is the number of tunnels. This article proposes the quotient set design variable method (QSDV) to implement the inequality constraint on the maximum genus allowed in an optimized structure for 3D structural topology optimization. The principle of the QSDV is to classify the changing design variables according to the connectivity of the elements in a structure to obtain the quotient set and update the corresponding elements in the quotient set to meet the topological constraint. Based on the standard relaxation algorithm discrete variable topology optimization method (DVTOCRA), the effectiveness of the QSDV is illustrated in numerical examples of a 3D cantilever beam.

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Grants

  1. no. 51675506/National Science Foundation of China
  2. 2017ZX10304403/National Science and Technology Major Project
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