中文摘要：

构架是机车车辆的重要承载部件,控制其侧梁的焊接残余变形至关重要.以热弹塑性理论为基础采用APDL语言对侧梁进行了焊接变形数值仿真计算,并对侧梁进行现场跟踪测量,得出侧梁的焊接变形仿真计算结果与测量值,二者基本吻合,误差在6%之内.以此仿真模型为基础,采用多层优化计算方法,对侧梁焊接时的随焊冲击碾压参数进行了优化分析,得到与焊接工艺相匹配的最优方案,计算结果表明最优方案能够降低残余变形量60%左右,最优随焊冲击碾压对于减小焊接残余变形效果明显.通过数值仿真优化所得的方案可为焊接变形的控制、焊接工艺设计的选择、随焊冲击碾压设备的设计等提供可靠依据.

英文摘要：

Bogie frame is the main carrying part of locomotive.It is important to control the welding residual defor-mation of the side beam.Based on the thermal-elastic-plastic theory,numerical simulation of the welding residual deformation was done with APDL,and field tracking measurement of the side beam was also conducted.The compu-tation results were found basically consistent with the measured data,with the error within 6%.On the basis of the numerical simulation model,and utilizing multi-layer optimizing computing method,the optimization analysis of parameters about weld with trailing impactive rolling was done with numerical simulation model,and the optimum scheme was obtained.The results show that the weld with optimal parameters＇s trailing impactive rolling can markedly decrease welding residual deformation,and make it decrease by 60%.The optimum scheme by numerical simulation provides reliable theoretical references for controlling welding residual deformation,determining the welding tech-nology and designing the equipment of weld with trailing impactive rolling.