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论文类型：期刊论文

发表时间：2012-03-01

发表刊物：STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION

收录刊物：SCIE、EI、Scopus

卷号：45

期号：3

页面范围：451-466

ISSN号：1615-147X

关键字：Skeletal structure; Topology optimization; Automatic grouping; Genetic algorithm; Frequency constraint

摘要：This paper studies singular optimum topology of skeletal structures with frequency constraints. To capture the local flexural vibration modes of members, skeletal structure should be approximately modeled as frame structure. However, the topology optimization of frame structures has the characteristics of singular optimum and disjoint feasible domain. For the discrete nature of such problem, the optimum design can't be obtained by continuous search. To handle the difficulty, the automatic grouping genetic algorithm with improvements in crossover operator and penalty function is applied to optimize frame structures. Two examples demonstrate the effectiveness of the proposed approach.