随焊激冷法控制高速列车地板焊接变形的数值模拟  

Numerical simulation on controlling high-speed train floor welding deformation by means of welding with chilling

作　　者：韩德成[1] 陈东方[1] 张铁浩[1] 刘雪松[2] 路浩[1] 陶传琦[1] 

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]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《电焊机》2016年第2期74-77,共4页Electric Welding Machine

基　　金："十一五"国家科技支撑计划高速列车车体技术项目(2009BAG12A04-B04)

摘　　要：利用非线性有限元分析软件MSC.Marc模拟空冷及不同随焊激冷措施下高速列车地板结构的焊接变形及温度场。模型中使用母材和填充材料的动态特性参量,采用移动双椭球热源模型进行计算,结果表明随焊激冷措施对近缝区的温度场的干涉作用明显,焊接时可有效降低峰值温度和热影响区宽度。此外随焊激冷措施对较小角变形、纵向挠曲变形也有一定效果,对离焊缝中心较近及较远处的温度场同时进行控制的随焊激冷方案可使焊后的纵向挠曲变形减小近一半。The numerical simulation,which studied welding deformation and temperature field of high-speed train floor with different way of welding chilling,was carried out by MSC.Marc,a kind of non-linear finite element soft. Temperature dependent property parameters of material and moving double ellipsoid heat source model were used in the simulation. The results showed that welding chilling,which efficiently decreased peak temperature and width of HAZ,played a vital role in temperature field near welding zone.In addition,welding with chilling had some success in preventing angular distortion and longitudinal flexure deformation. In the scheme of welding chilling,which controlled temperature field both nearer and farer the center of welding,longitudinal flexure deformation reduced by half nearly.

关 键 词：随焊激冷 高速列车地板 焊接变形 

分 类 号：TG404[金属学及工艺—焊接]