东南大学学报（英文版）2018，Vol.34Issue(2)：199-207,9.DOI:10.3969/j.issn.1003-7985.2018.02.009
不同工况下的薄壁件焊接装配热态特性数值仿真分析
Welding thermal characteristics analysis with numerical simulation for thin-wall parts assembly under different conditions
摘要
Abstract
In order to analyze the welding thermal characteristics problem, the multiscale finite element ( FE) model of T-shape thin-wall assembly structure for different thicknesses and the heat source model are established to emphatically study their welding temperature distributions under different conditions. Simultaneously, different welding technology parameters and welding directions are taken into account, and the fillet weld for different welding parameters is employed on the thin-wall parts. Through comparison analysis, the results show that different welding directions, welding thicknesses and welding heat source parameters have a certain impact on the temperature distribution. Meanwhile, for the thin-wall assembly structure of the same thickness, when the heat source is moving, the greater the moving speed, the smaller the heating area, and the highest temperature will decrease. Therefore, the welding temperature field distribution can be altered by adjusting welding parameters, heat source parameters, welding thickness and welding direction, which is conducive to reducing welding deformation and choosing an appropriate and optimal welding thickness of thin-wall parts and relative welding process parameters, thus improving thin-wall welding structure assembly precision in the actual large-size welding structure assembly process in future.关键词
焊接装配/薄壁件/热态特性/热源模型/焊接方向Key words
welding assembly/thin-wall parts/thermal characteristics/heat source model/welding direction分类
矿业与冶金引用本文复制引用
潘明辉,汤文成,幸研..不同工况下的薄壁件焊接装配热态特性数值仿真分析[J].东南大学学报（英文版）,2018,34(2):199-207,9.基金项目
The National Natural Science Foundation of China (No. 51675100),the National Numerical Control Equipment Major Pro-ject of China(No. 2016ZX04004008). （No. 51675100）
