中文摘要：

按实际加工工艺,基于有限元软件SYSWELD,采用有限元热弹塑性分析方法和Fortran语言对焊接热源进行二次开发,获得了所需要的热源,并通过实验验证了热源模型的准确性.在此基础之上,通过分析高速列车CRH380B侧墙焊接残余应力分布规律和焊接顺序对于侧墙焊接残余应力的影响,得到了侧墙焊接最优方案,为企业实际生产中的降低焊接残余应力方案选择提供了依据.

英文摘要：

According to the actual process and based on finite element software SYSWELD, finite element thermal elastic-plastic analysis method and Fortran language are used for the secondary development of welding heat source to obtain the required heat source, and verify the accuracy of heat source model by experiment. On this basis, the welding residual stress distribution of CRH380B high-speed trains sidewall and welding sequence effects on welding residual stress of high-speed train sidewall are analyzed. The obtained sidewall weld optimal solution provides the basis for enterprise scheme selection to reduce welding residual stress in actual production.