某型双臂塔式起重机塔尖焊接数值仿真研究  

Numerical Simulation Study on Tower Tip Welding of a Double-Jib Tower Crane

作　　者：严浩东 马思群[1] 于佳田 苍松[2] YAN Hao-dong;MA Si-qun;YU Jia-tian;CANG Song(College of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian Liaoning116028,China;Guidaojiaotong Polytechnic Institute,Shenyang Liaoning110023,China)

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028 [2]辽宁轨道交通职业学院,辽宁沈阳110023

出　　处：《机械研究与应用》2022年第4期1-5,共5页Mechanical Research & Application

基　　金：国家自然科学基金资助项目:角焊缝剪切强度理论与尺寸设计准则研究(编号:51405057);辽宁省交通运输厅交通科技计划项目:基于TCN总线的高速列车轮轴轴温异常故障应对虚拟现实系统开发(编号:202151)。

摘　　要：塔尖是塔式起重机上的重要承力机构,同时也是一个典型的焊接结构,焊接产生的残余应力将会影响塔式起重机的安全应用。以某型号双臂塔式起重机的塔尖为研究对象,使用二维网格对其进行离散,基于三维热弹塑性理论,采用双椭球热源模型,利用焊接软件SYSWELD研究了焊接电流对熔池形状以及焊接残余应力的影响规律。并通过计算确定了在焊接速度为10 mm/s、焊接电压为25 V的情况下,该塔吊焊接的电流大小适合。结果表明,随着焊接电流的增大,熔池尺寸以及残余应力都会随之变大,该结果为双臂塔式起重机的焊接仿真与实际生产提供了指导。The tower tip is not only an important load-bearing mechanism of the tower crane,but also a typical welded structure;the residual stress caused by welding will affect the safe application of the tower crane.Taking the tip of a double-jib tower crane as the research object,it is discretized by two-dimensional grid.Based on the three-dimensional thermal elastoplastic theory,the double ellipsoidal heat source model is adopted and the welding software SYSWELD is used to study the influence of welding current on the shape of weld pool and welding residual stress.Through calculation,the suitable welding current of the tower crane is determined when the welding speed is 10mm/s and the welding voltage is 25V.The results show that the weld pool size and residual stress will increase with the increase of welding current,which provides guidance for the welding simulation and actual production of the double-arm tower crane.

关 键 词：双臂塔式起重机 塔尖 焊接数值模拟 焊接电流 残余应力 

分 类 号：TH213.1[机械工程—机械制造及自动化]