Satisfying Trade-off Method for Multi-objective Topology Optimization by OptiStruct
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摘要: 为了研究多工况下静态刚度和动态振动频率为目标函数的拓扑优化结构设计,提出了一种连续体结构多目标拓扑优化的研究方法。基于实体各向同性材料惩罚函数(SIMP)的插值模型,采用满意协调法把多目标问题转化为单目标问题,从而避免因单目标拓扑优化而不能满足车体结构性能要求的缺点,同时通过一些变换,规避了满意协调法中不含等式约束这一条件。运用OptiSt-ruct平台,以发动机盖为实例进行多目标拓扑优化,并与已经用于生产的成熟的发动机盖模型进行对比,验证了优化方案的可行性。
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关键词:
- 多目标 /
- 拓扑优化 /
- 满意协调法 /
- OptiStruct
Abstract: A multi-objective topology optimization method for continuum structures, satisfying trade-off method was proposed in this paper, in which both the compliance and eigenvalue were regarded as static and dynamic optimiza-tion objectives. Based on the interpolation model of the solid isotropic material with penalization(SIMP), satisfying trade-off method was used to transform the multi-objective question as the simple target question. This method over-comes the shortcoming of single-objective topology optimization, which can not meet the performance requirements of automotive structures. At the same time, some transformation methods were employed to avoid equality constraint condition of the Satisfying trade-off method. Taking the engine's hood as the example, the multi-objective topology optimization by the OptiStruct software was carried out, and the numerical calculation results verified the feasibility of the optimization program compared with the hood＇s mature model.-
Key words:
- calculations /
- computer simulation /
- computer software /
- efficiency
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[1] Bendsoe M P，Kikuchi N．Generating optimal topologies in struc-tural design using a homogenization method[J]. Computer Method in Applied Mechanics and Engineering，1988，71 (1):197～224 [2] 张晔，吕新生．机械优化设计[M]．合肥:合肥工业出版 社，2009 [3] Min S，Nishiwaki S，Kikuchi N．Unified topology design of static and vibrating structures using multiobjective optimization[J]．Computers and Structures，2000，75:93～116 [4] 范文杰，范子杰，苏瑞意．汽车车架结构多目标拓扑优化方法 研究[J]．中国机械工程，2008，19(12):1505～1508 [5] 杨磊．支撑结构多目标拓扑优化方法研究[D]. 宜昌:三峡大 学，2010 [6] 祝小元，方宗德，中闪闪等．汽车悬架控制臂的多目标拓扑优 化[J]. 汽车工程，2011，33(22):139～141 [7] 周克民，李俊峰，李霞．结构拓扑优化研究方法综述[J]. 力学 进展，2005，35(1):69～76 [8] 刘辉，项昌乐，张喜清．多工况变速器箱体静动态联合拓扑优 化[J]. 汽车工程，2012，34(2):143～153 [9] 左孔天，赵雨东，钟毅芳等．微型柔性机构的多目标计算机辅 助拓扑优化设计[J]. 计算机辅助设计与图形学学报，2006，18(6):854～859 [10] Bendsoe M P，Sigmund O．Material interpolations in topology op-timization[J]. Archive of Applied Mechanics，1999，69:635～654 [11] 芮强，王红岩，王良曦．多工况载荷下动力舱支架结构拓扑优 化设计[J]. 兵工学报，2010，31(6):782～786 [12] 陈立周．机械优化设计方法[M]. 北京:冶金工业出版 社，2005 -
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