Fixture Locating Modelling and Optimization Research of Aluminum Alloy Sidewall in a High-Speed Train Body  

作　　者：WANG Xianjin GAO Xu YU Kuigang 王先进;高旭;于奎刚(School of Mechanical Engineering,Shandong University,Jinan 250061,China;Key Laboratory of High Eficiency and Clean Mechanical Manufacturing of Ministry of Education,Shandong University,Jinan 250061,China;National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,Jinan 250061,China)

机构地区：[1]School of Mechanical Engineering,Shandong University,Jinan 250061,China [2]Key Laboratory of High Eficiency and Clean Mechanical Manufacturing of Ministry of Education,Shandong University,Jinan 250061,China [3]National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,Jinan 250061,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2020年第6期706-713,共8页上海交通大学学报（英文版）

基　　金：the National Natural Science Founda-tion of China(No.51375277);the Natural Science Foundation of Shandong Province(No.ZR2016EEM31)。

摘　　要：The high-speed train body is welded with aluminum alloy assemblies or parts.Due to the material properties,the welding deformation is much significant.In order to control the welding deformation,this paper takes the sidewall welding of a high-speed train body as the research objective,and carries out the fixture locating modelling and optimization research of the aluminum alloy sidewall.Firstly,a finite element model of the sidewall is established and verified by the comparison between the analysis results and the actual measurement data.Then the residual stress and deformation of the sidewall after welding are analyzed.By selecting the longitudinal parameters of different fixture locating layouts for welding analysis,models describing the relat ionship between the maximum welding residual stress and maximum welding deformation and the longitudinal fixture locating distance of the sidewall are established.Finally,the fixture locating model of welding deformation is used to optimize the longit udinal fixture locating distance.And the transverse fixture locating distance is also optimized by comparing different locating positions.The result shows that the welding residual stress and the welding deformation have been decreased in the optimal fixture locat ing layout.

关 键 词：aluminum alloy sidewall welding residual stress welding deformation fixture design 

分 类 号：U266[机械工程—车辆工程]