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论文类型：期刊论文

发表时间：2011-11-01

发表刊物：STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION

收录刊物：Scopus、SCIE、EI

卷号：44

期号：5

页面范围：713-717

ISSN号：1615-147X

关键字：Topology optimization; Symmetry; Non-symmetry

摘要：Recent study by Rozvany discussed an important topic in structural topology optimization: non-uniqueness and symmetry. This paper demonstrates that for the frame topology optimization with frequency objective or frequency constraints, the topology optimum is not symmetric even when the geometry, material distribution and ground structure are symmetric. Two benchmark examples with fundamental frequency constraints support our view. Nonlinear and non-convex constraints are contributors to non-symmetric optimum solution for the class of topology optimization problems considered here.