城轨铝合金车体侧墙焊接仿真分析
|
摘要
基于热—弹—塑性有限元法,根据实际加工工艺,借助大型非线性有限元软件ABAQUS,对某城轨铝合金车体司机室处侧墙的焊接变形进行仿真模拟.利用八节点六面体网格对侧墙模型进行精准建模,并利用移动的双椭球热源来模拟MIG自动焊过程.设计了三种不同的焊接顺序,通过量化对比不同焊接顺序下的仿真结果.结果表明,在不同焊接顺序的工艺方法下对侧墙焊后变形挠度大小具有一定影响,且由外侧向内侧的焊接顺序能更好的控制侧墙焊后变形.
According to the actual processing technology, the welding deformation of an aluminum alloy car body sidewall of mass transit train is simulated with the aid of the large-scale and non-linear finite element software ABAQUS based on thermoelastic-plastic finite element method. The sidewall structure is accurately modeled by 8-node hexahedral elements, and the moving double ellipsoid heat sources are applied to simulate the MIG automatic welding process. Three welding sequences are designed based on the engineering practice, and the influence of welding sequence on the welding deformation of the aluminum alloy sidewall is discussed under different welding sequences by comparing the simulation results. The results show that the welding deformation can be affected under different welding sequences, and the sequence from the outside to the inside can control the welding deformation of the sidewall better.
According to the actual processing technology, the welding deformation of an aluminum alloy car body sidewall of mass transit train is simulated with the aid of the large-scale and non-linear finite element software ABAQUS based on thermoelastic-plastic finite element method. The sidewall structure is accurately modeled by 8-node hexahedral elements, and the moving double ellipsoid heat sources are applied to simulate the MIG automatic welding process. Three welding sequences are designed based on the engineering practice, and the influence of welding sequence on the welding deformation of the aluminum alloy sidewall is discussed under different welding sequences by comparing the simulation results. The results show that the welding deformation can be affected under different welding sequences, and the sequence from the outside to the inside can control the welding deformation of the sidewall better.
引文
[1]唐朝明.铝合金的焊接技术[J].焊接技术,1995(1):46-47.
[2]杨鑫华,郭太金,许永辉,等.铝合金货车侧墙多道焊变形预测[J].大连交通大学学报,2014,35(1):81-85.
[3]徐志强,李志敏,朱平,等.高速列车司机室前窗框焊接变形[J].上海交通大学学报,2012,46(7):1088-1091.
[4]汪建华,陆皓,魏良武.固有应变有限元法预测焊接变形理论及其应用[J].焊接学报,2002(6):36-40.
[5]JANUSZ KOZAK.Problems of determination of welding angular distortions of t-fillet joints in ship hull structures[J].Polish Maritime Research,2015,22:79-85.
[6]米高阳,魏艳红,占小红,等.平板焊接有限元分析过渡型网格自动生成技术分析[J].焊接学报,2015,36(5):44-46,88.
[7]李培麟,陆皓.双椭球热源参数的敏感性分析及预测[J].焊接学报,2011,32(11):89-91,95.
[8]黄健康,韩日宏,薛诚,等.MIG堆焊温度场有限元求解及验证[J].兰州理工大学学报,2011,37(3):23-27.
[9]王苹,王强,刘雪松,等.基于FEM的高速列车地板结构焊接顺序优化[J].焊接学报,2012,33(8):45-48,115.
[10]马思群,刘业华,韩清凯,等.焊接顺序对高速列车侧墙焊接残余应力的影响[J].大连交通大学学报,2015,36(3):68-72.
[11]方洪渊.焊接结构学[M].北京:机械工业出版社,2008.
[2]杨鑫华,郭太金,许永辉,等.铝合金货车侧墙多道焊变形预测[J].大连交通大学学报,2014,35(1):81-85.
[3]徐志强,李志敏,朱平,等.高速列车司机室前窗框焊接变形[J].上海交通大学学报,2012,46(7):1088-1091.
[4]汪建华,陆皓,魏良武.固有应变有限元法预测焊接变形理论及其应用[J].焊接学报,2002(6):36-40.
[5]JANUSZ KOZAK.Problems of determination of welding angular distortions of t-fillet joints in ship hull structures[J].Polish Maritime Research,2015,22:79-85.
[6]米高阳,魏艳红,占小红,等.平板焊接有限元分析过渡型网格自动生成技术分析[J].焊接学报,2015,36(5):44-46,88.
[7]李培麟,陆皓.双椭球热源参数的敏感性分析及预测[J].焊接学报,2011,32(11):89-91,95.
[8]黄健康,韩日宏,薛诚,等.MIG堆焊温度场有限元求解及验证[J].兰州理工大学学报,2011,37(3):23-27.
[9]王苹,王强,刘雪松,等.基于FEM的高速列车地板结构焊接顺序优化[J].焊接学报,2012,33(8):45-48,115.
[10]马思群,刘业华,韩清凯,等.焊接顺序对高速列车侧墙焊接残余应力的影响[J].大连交通大学学报,2015,36(3):68-72.
[11]方洪渊.焊接结构学[M].北京:机械工业出版社,2008.