容差系数对某重型卡车车架多目标拓扑优化结果的影响  

Influence of tolerance coefficient on multi-objective topology optimization results of a heavy truck frame

作　　者：夏洋[1] 梁伟[1] 张璟鑫 王海光[1] 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《现代制造工程》2015年第9期92-95,108,共5页Modern Manufacturing Engineering

基　　金：重庆市教委自然科学基金计划项目(KJ130401)

摘　　要：多级容差序列法是解决多目标拓扑优化问题的常用方法之一。其中,容差系数是直接影响最终优化结果的重要参数。目前,容差系数主要依据设计经验进行确定,但利用经验得到的容差系数仅适用于某些特定的结构。以重型卡车车架的多目标拓扑优化为例,考察了不同容差系数的选取对多目标拓扑优化结果的影响程度。研究结果表明:容差系数对各工况下的多目标优化结果均产生影响;随容差系数的增加,最优拓扑构型中车架前部"X"型横梁结构增加,车架后部第一"I"型横梁结构消失,第二"I"型横梁结构转变为"X"型;选择较大的容差系数可以增大第二级目标的拓扑优化效果,选择较小的容差系数则使第一级目标拓扑优化效果显著。The multilevel tolerant sequential programming approach is one of the common methods which is applied to solve multi- objective topology optimization. And tolerance coefficient as an important parameter affects optimization result directly. At present, design experience is the main basis to determine the tolerance coefficient which is only appropriate to some structures. The topolo- gy optimization of a heavy truck frame was taken as an example to discuss the influence of different tolerance coefficient on multi- objective optimization results. The results show that tolerance coefficient would affect the optimization results of different load ca- ses. The optimal topology configuration indicates that a new ＇ X＇ type beams on the front end of the frame would appear with the increase of tolerance coefficient, and the first ＇I＇ type beams of the rear would disappear, the second ＇I＇ type beams would turn to ＇ X＇ type. The last level objective would demonstrate a better optimization result while a large tolerance coefficient is chosen, otherwise the optimization effect on former level objective would be more significant.

关 键 词：容差系数 多级容差序列法 多目标 拓扑优化 

分 类 号：O327[理学—一般力学与力学基础] TB115.1[理学—力学]