高压线夹管杆接头焊接残余应力分析  

Welding Residual Stress Analysis in High Voltage Clamp Tube-to-rod Joint

作　　者：李巧全 巫世晶[1] 王晓笋[1] 黎小峰 LI Qiaoquan;WU Shijing;WANG Xiaosun;LI Xiaofeng(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072

出　　处：《热加工工艺》2020年第15期104-109,共6页Hot Working Technology

基　　金：国家自然科学基金项目(51375350);国家电网公司科技项目(5211DS16002L)。

摘　　要：通过开发DFLUX子程序,在ABAQUS软件中建立了高压线夹管杆接头焊接有限元模型,利用试验数据验证了仿真模型的有效性。对焊接过程进行了模拟研究,得到了焊接温度场和残余应力场。进一步分析了恒定线能量下不同焊接速度与功率组合对温度场和残余应力场的影响规律。研究结果表明:管材侧的温度高于杆材侧的温度,杆材侧的焊缝附近存在很大的轴向、环向拉伸残余应力,径向残余应力可以忽略。线能量不变时,轴向、环向残余应力随焊接速度与功率的增大而增大,适当降低焊接速度和功率,有利于提高接头的使用寿命。The welding finite simulation model of high voltage clamp tube-to-rod joint was built in ABAQUS software through the development of DFLUX subroutine.Then,the validity of simulation model was verified by experimental data.The simulation investigation about the welding process was carried out to obtain the welding temperature and residual stresses field.The effect of different welding speed and power combination on welding temperature and residual stresses under constant heat input was also studied.The results show that the temperature at tube side is higher than that at the rod side.The axial and hoop residual stresses near the weld at the rod side is large,while the radial stress can be ignored.Under constant heat input,the axial and hoop residual stresses increase with the increase of welding speed and power,thus,the service life of the joint can be improved by reasonably reducing the welding speed and power.

关 键 词：管杆接头 数值模拟 焊接温度 残余应力 

分 类 号：TG404[金属学及工艺—焊接]