考虑屈曲响应的碳钢客车车体底架结构的拓扑优化

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英文篇名：Topology Optimization of Underframe Structure of Carbon Steel Passenger Car with Buckling Response 作者：谢素明 ; 袁腾 ; 黄福伟 ; 伊召峰 英文作者：XIE Suming;YUAN Teng;HUANG Fuwei;YI Zhaofeng;School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University;CRRC Tangshan Co., Ltd; 关键词：碳钢车体 ; 屈曲分析 ; 子结构 ; 拓扑优化 英文关键词：carbon steel body;;buckling analysis;;sub-structure;;topology optimization 中文刊名：DLTD 英文刊名：Journal of Dalian Jiaotong University 机构：大连交通大学机车车辆工程学院;中车唐山机车车辆有限公司技术中心; 出版日期：2019-06-15 出版单位：大连交通大学学报 年：2019 期：v.40;No.183 基金：国家重点研发计划资助项目(2017YFB1201302-11) 语种：中文; 页：DLTD201903007 页数：5 CN：03 ISSN：21-1550/U 分类号：39-42+63

摘要

利用子结构和拓扑优化相结合的技术,研究碳钢客车车体底架结构的稳定性问题.首先,在1280kN车钩压缩载荷作用下,对某碳钢车车体结构进行线性屈曲分析,指出底架薄板部位因纵向刚度不足导致其屈曲因子偏低;然后,开展整车级底架失稳区域的典型结构的基于屈曲响应的拓扑优化,分别将碳钢车车体底架侧门和端部区域的典型结构定义为非子结构,其它车体单元定义为超单元,它们的边界结点定义为出口结点;接着,依据两典型结构的拓扑优化结果,确定优化设计方案;最后,经整车级结构的稳定性分析,优化结构的屈曲因子分别提高了0.67和0.95.这种考虑屈曲响应的、借助子结构方法的整车级高效的底架拓扑优化技术可推广到车体其它部位的优化设计中.
        The stability of carbon steel car-body underframe structure is analyzed by sub-structure and topology optimization technology. Linear buckling analysis of a carbon steel car-body is carried out under the coupler compression load of 1280 kN. It is pointed out that the buckling factor of the underframe consisted of thin plates is low due to the lack of longitudinal rigidity. Then, the typical underframe structure with low buckling factor is defined as non-substructure, the other is defined as super-elements, and their boundary nodes are defined as exit nodes. After the typical structure optimization with the consideration of buckling response, the typical structures design scheme is determined based on the optimization results. Finally, the car-body stability is analyzed, and the buckling factor of the optimized structure is improved by 0.67 and 0.95 respectively. The efficient topology optimization technology with sub-structure, which is aimed for raising buckling factor, can be extended to other part optimal design of the car-body.

引文

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