面向不锈钢地铁整车结构的显式拓扑优化设计  

Explicit Topology Optimization Design of Stainless Steel Metro Carbody

作　　者：林鹏 于洋洋 田洪雷 户迎灿 陈书杰 Peng Lin;Yangyang Yu;Honglei Tian;Yingcan Hu;Shujie Chen(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266000)

机构地区：[1]中车青岛四方机车车辆股份有限公司,青岛266000

出　　处：《固体力学学报》2022年第1期111-120,共10页Chinese Journal of Solid Mechanics

基　　金：中国中车股份有限公司科技研究开发计划(2020CCB111)资助。

摘　　要：随着轨道车辆轻量化设计需求日益突出,拓扑优化技术正加速应用于车辆关键局部结构高性能轻量化设计并取得较显著减重成果,但受限于制造要求和较大的计算规模,整车级车体结构拓扑优化已为轨道车辆设计阶段的难点之一.论文针对某不锈钢地铁车体结构设计需求,基于移动可变形组件法(Moving Morphable Component, MMC),开展显式拓扑优化框架下的整车级车体结构优化设计.依据EN 12663标准工况及车体设计空间,建立了地铁车体结构MMC拓扑优化数学模型,给出了相应的拓扑优化设计流程,搭建了地铁车体结构显示拓扑优化算法平台.按照设计流程,基于灵敏度的驱动,以车体结构的整体刚度作为设计目标,同时设置质量约束,通过调控组件移动、旋转和变形,实现对整车级车体结构的拓扑优化研究,确定了车体拓扑构型.基于MMC方法,可有效降低优化过程中的计算量,直接获取较为清晰的不锈钢地铁车体结构整车级传力路径,论文数值算例验证了该算法的优势.The increasingly prominent demand for lightweight design of rail vehicles has accelerated the application of topology optimization technology in high-performance lightweight design of key local structures of vehicles, and significant weight reduction results have been achieved. However, due to the manufacturing requirements and the large scale of calculation efforts, the topology optimization at the vehicle-level carbody structure is one of the difficulties in rail vehicle design. In the present work, the topology optimization design of a stainless steel metro carbody structure is studied. To achieve this purpose, the moving morphable component(MMC)-based explicit topology optimization approach is adopted and an optimization design platform under the MMC framework is also established. According to EN 12663 standard design conditions and carbody design space, the mathematical MMC-based topology optimization model for metro carbody structure is established, and the corresponding topology optimization design process is given. According to the design process, based on the sensitivity-driven method, taking the overall stiffness of the carbody structure as the design goal, and setting mass constraints, the topology optimization of the vehicle-level carbody structure is realized through adjusting the movement, rotation and deformation of components, and the carbody structure topology configuration is determined and compared with the optimization results of commercial software. Resorting the explicit geometry description of MMC, the proposed approach has some advantages for metro car design compared with traditional topology optimization methods: 1) the primary manufacturing requirements can be satisfied through controlling the upper and lower bounds of the design variables;2) the calculation efforts in the solving of optimization can be reduced effectively due to the drastic reduction of design variables;3) unlike traditional methods, a clear loading path of the vehicle-level carbody structure can be obtained in a direc

关 键 词：移动可变形组件法(MMC) 显式拓扑优化 整车轻量化设计 不锈钢地铁 

分 类 号：U270.2[机械工程—车辆工程]