角接接头热源模型的温度场数值模拟.pdf

角接接头热源模型的温度场数值模拟 [1] [1] [2] [1] 毛志伟 ，姜银松 ，周少玲 ，赵滨 （南昌大学 机电工程学院,江西 南昌: 330031） 摘要：根据角接接头焊接特性，分析其焊缝不对称的特性，在双椭球热源基础上改进其热源模型，以 Q235 为母材，根 据试验与反演算法得出改进双椭球热源参数并对其热源模型进行仿真验证，获得了焊缝成形过程与温度场分布规律及对咬边 的影响。得出热源中心处纵横能量分布，证明了上下焊缝不对称的原则，该方法为合理选择焊接工艺参数和保证焊接质量提 供依据参考，仿真结果表明，改进的热源模型正确。 关键词：角接接头；焊接温度场；数值模拟；热源模型 TG44 A 中图分类号： 文献标识码： 文章编号： Numerical simulation of temperature field of corner joint heat model MAO Zhi-Wei, Jiang Yin-Song,ZhouShao-Ling , ZhaoBin (School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, China) Abstract: According corner joint welding characteristics, it analyzes the weld asymmetrical features and establishes a new heat source model.it is concluded that is parameters of double ellipsoid heat and validating their model simulation with combining test results with the inversion algorithm as a base material in Q235.the last it won the weld process and the distribution of temperature field and the impact on the biting edge.it is proved that seam is the principle of asymmetry of up and down for distribution of the vertical and horizontal of the heat center energy. the method is a reasonable choice of welding parameters and welding quality assurance provide the basis for reference, the simulation results show that the improved heat source model is correct. Key words: corner joint; temperature distribution; numerical simulation; heat source model 随着焊接技术的发展，特别是船舶、车辆、桥 1 焊接