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纪斌,金栋平.柔性伸缩蒙皮支撑结构的多目标拓扑优化
Multi-objective topology optimization of support structure for flexible telescope skin[J].计算力学学报,2018,35(1):1~6
柔性伸缩蒙皮支撑结构的多目标拓扑优化
Multi-objective topology optimization of support structure for flexible telescope skin
Multi-objective topology optimization of support structure for flexible telescope skin
投稿时间:2016-11-26  修订日期:2017-05-19
DOI:10.7511/jslx20161126001
中文关键词:  拓扑优化  多目标优化  柔性蒙皮  伸缩变形  遗传算法
英文关键词:topology optimization  multi-objective optimization  flexible skin  telescope morphing  genetic algorithm
基金项目:国家自然科学基金(91016022,91216103);装备预研基金(6140210010202);江苏高校优势学科建设工程资助项目.
作者单位E-mail
纪斌 南京航空航天大学 机械结构力学及控制国家重点实验室, 南京 210016  
金栋平 南京航空航天大学 机械结构力学及控制国家重点实验室, 南京 210016 jindp@nuaa.edu.cn 
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中文摘要:
      针对柔性伸缩蒙皮支撑结构的多目标拓扑优化问题,分析了其实际应用中的优化对象及目标函数,提出使用六边形对设计域进行离散的方法,并建立离散模型与位矩阵的映射关系。采用基于位矩阵的NSGA-Ⅱ(Non-dominated Sorting Genetic Algorithm Ⅱ)进行求解。优化过程中引入个体连通性分析以提高计算效率。通过对可行个体进行有限元分析,获得其目标值;使用罚函数法对不可行个体加以惩罚,最终得到一组互不支配的支撑结构。结果表明,本方法可为柔性伸缩蒙皮支撑结构的多目标拓扑优化问题提供可行、有效的解,也可用于求解其它二维多目标拓扑优化问题。
英文摘要:
      NSGA-Ⅱ with connectivity analysis is employed for the multi-objective topology optimization of the support structure for flexible telescope skin,in which bit-matrix is used as the representation of a chromosome.The objective functions of multi-objective topology optimization are established by analyzing the optimization target of the support structure.The design domain is discretized by hexagon and the mapping between design domain and the bit-matrix is established subsequently.In order to improve the efficiency,the connectivity analysis is put forward.The objectives such as the performance of in-plane and out-of-plane of the feasible individuals are obtained by FEA,and the NSGA-Ⅱ is realized by penalizing the infeasible individuals.A sequence of the feasible configurations of the support structure is obtained finally.It can be seen from the results that the method in this paper can provide feasible and effective solutions for multi-objective topology optimization of the support structure for flexible telescope skin and also solve other multi-objective topology optimization problems in 2D.
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