液压机下横梁结构拓扑的进化结构优化  

Evolutionary topology optimization of the lower stable of a hydraulic press

作　　者：张大可[1] 孙圣权[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]中国核动力研究设计院,成都610005

出　　处：《重庆大学学报（自然科学版）》2009年第10期1117-1121,共5页Journal of Chongqing University

基　　金：国家自然科学基金面上项目资助(50875268)

摘　　要：针对传统的形状尺寸优化方法难于获得全局最优解的问题,应用基于应力突变率的双向进化结构优化(BESO)算法对传统三梁四柱式液压机下横梁进行结构拓扑优化,分析进化历程和参数指标。算法实现了液压机下横梁最优结构拓扑和形状尺寸优化的一致,获得了合理的液压机下横梁新型拓扑结构。有限元分析对比表明,新结构实现了结构最大应力最小化和应力分布均匀化,提高了材料利用率。It is difficult to obtain the globe optimum solution by applying conventional sizing and geometrical optimization methods. Evolutionary topology optimization is conducted for the lower stable of a hydraulic press using a hi-directional evolutionary structure optimization （BESO） method based on ratio of stress changes, and the evolutionary history and index are analyzed. The presented algorithm obtains the simultaneous optimization on both geometry and topology, and a new topology of the lower stable of the press is evolved which possesses a reasonable topological structure. The results of finite element analysis show that the new structure has decreased maximum stress, uniform stress distribution and good material usage.

关 键 词：拓扑优化 进化结构优化(ESO) 液压机下横梁 有限元 

分 类 号：TH122[机械工程—机械设计及理论]