基于改进群搜索优化算法的桁架结构拓扑优化研究  

Research on topology optimization of truss structures based on the improved group search optimizer

作　　者：刘锋[1] 谢灏斌[1] 李丽娟[1] 

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《空间结构》2010年第4期22-28,共7页Spatial Structures

基　　金：国家自然科学基金资助项目(10772052);广东省自然科学基金资助项目(06104655;8151009001000042;9151009001000059)

摘　　要：对桁架结构拓扑优化设计方法进行了研究,基于和声搜索方法和边界粘附机制,提出了用"启发式拓扑"或"拓扑变量离散化"处理变量的改进群搜索优化方法,分别对一个10杆桁架和一个15杆桁架进行了拓扑优化设计,计算结果与已有的文献结果进行了对比分析.研究表明,该算法不受传统的桁架拓扑优化中"基结构"的限制,避免了奇异最优解的问题,表现出较强的适用性,采用本文提出的方法对桁架结构进行拓扑优化是可行和有效的.Based on harmony search mechanism and adhered to boundary mechanism,an improved group search optimizer for topology optimization was presented in this paper.In this new group search algorithm,the variables were treated with ＇heuristic topology＇ or ＇discretion of topology variables＇.A 10-bar truss structure and a 15-bar truss structure were analyzed and the calculation results compared with those of references.The study shows that the algorithm presented is not limited by traditional ＇ground structure＇ and can avoid the singular solution in topology optimization.The calculation results of the topology optimization examples proved the feasibility and effectiveness of the improved algorithm for topology optimal design of truss structures.

关 键 词：桁架 拓扑优化 群搜索 

分 类 号：TU323.4[建筑科学—结构工程]