转向架构架补焊残余应力数值模拟  

Residual stress numerical simulation of repair welding in bogie frame

作　　者：张志毅[1] 韩永彬[1] 王心红[1] 李丹丹[2] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,山东青岛266111 [2]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《电焊机》2012年第4期82-86,共5页Electric Welding Machine

基　　金："十一五"国家科技支撑计划基金资助项目(2009BAG12A02-B02-2)

摘　　要：转向架作为车辆走行部的主要构件,常采用局部补焊的手段进行修复,这势必影响接头残余应力。利用ABAQUS有限元分析软件,分别对焊态、不同补焊参数和补焊次数后的残余应力进行了数值模拟。模拟计算结果表明:补焊后焊缝的纵向应力大大增加,横向应力减小;但随着补焊次数的增加,纵向应力变化不大,横向应力有所增加;随深度增加,纵向应力涨幅不大,横向应力有所增加;随补焊宽度增加,焊缝区的横向应力有所增加,纵向应力略有增加但幅度不大。开展对转向架焊接构架对接焊缝补焊残余应力分析,对于指导焊接转向架生产、降低焊接接头残余应力具有重要的意义。The bogie is the main component of vehicle running,and it is often repaired by local repair welding,which would cause residual stress in butt weld during welding.The residual stress of repair welding in bogie was simulated separately with ABAQUS, the finite element analysis software.The results showed that the longitudinal stress of the weld increased significantly after repair welding, but the transverse stress decreased;With the increasing number of the repair welding, the longitudinal stress didn＇t change greatly, while the transverse stress increased;With the increasing depth of repair welding,the increase of longitudinal stress wasn＇t too much, but the transverse stress increased.With the increase of repair welding width ,the transverse stress increased ,and the longitudinal stress increased a little.lt is important that studying residual stress of repair welding to guide the bogie production and to reduce the welding residual stress of the joint.

关 键 词：SMA490BW 对接接头 多次补焊 残余应力 数值模拟 

分 类 号：TG457.21[金属学及工艺—焊接]