工程设计学报2016，Vol.23Issue(5)：444-452,9.DOI:10.3785/j.issn.1006-754X.2016.05.007
基于权重比的车架多工况拓扑优化方法研究
Research on the method of multi-case topology optimization of frame structure based on the weight ratio
摘要
Abstract
The frame will be subj ect to the test of various conditions in the actual moving condi-tions.So a plurality of topology results under every condition must be considered when conduc-ting topology optimization of the frame structure.While there is a common issue during the process of multi-case topology optimization about how to determine the weight ratio of respective condition and the final topology results of the frame depend directly on this distribution.This is-sue was showed a further study and a feasible solution to this problem with a combination of sur-rogate model and genetic algorithm was gaved.At first,a comprehensive obj ect function maximi-zing the static stiffness under multi-case was defined by using compromise programming ap-proach.And then,a Radial Basis Function surrogate model was constructed by using optimal Latin Hypercube Sampling,meanwhile,optimal weight ratios of every load condition had been obtained with the method of combining surrogate model with NSGA-II.At last,the optimal weight ratios obtained in the previous process were applied into the obj ect function and a feasible topology result of the frame structure was got which had considered multi-case loads.Moreover, the contrastive study was carried out to compare the comprehensive obj ective optimization ap-proach proposed in this study with those that determined the weight ratio by analytic hierarchy process (AHP)or orthogonal experimental design (OED).Compared with the other two meth-ods,this method had the lowest value of comprehensive objective function and the weighted com-pliance of all conditions was also the lowest.Results show that the method proposed in this paper is a good solution to obtain weight ratio of every condition in the process of topology optimization of a frame and is superior to reference methods.关键词
权重比/代理模型/遗传算法/车架/拓扑优化Key words
weight ratio/surrogate model/genetic algorithm/frame/topology optimization分类
交通工程引用本文复制引用
邱瑞斌,雷飞,陈园,王琼..基于权重比的车架多工况拓扑优化方法研究[J].工程设计学报,2016,23(5):444-452,9.基金项目
国家自然科学基金资助项目(11232004) （11232004）
