摘要
在铝合金搅拌摩擦焊三维体积热源模型建模过程中,轴肩、搅拌针侧面以及搅拌针底面摩擦产热的热流密度加载范围存在不确定性,需校核确定,增加了建模难度。针对该问题,建立三维搅拌摩擦焊热源模型,并确定其不确定热源模型参数,研究了这些参数变化对焊缝温度场的影响规律。在此基础上,基于参数变化影响规律建立了搅拌摩擦焊热源模型参数库,设计了推理规则,形成实现快速建模的铝合金搅拌摩擦焊热源模型专家系统。基于搅拌摩擦焊实验温度场结果验证了专家系统功能,该系统显著降低了搅拌摩擦焊数值模拟建模难度,有利于促进铝合金搅拌摩擦焊数值模拟技术的普及应用。
In establishing model process of three-dimensional heat source model of aluminum alloy friction stir welding,heat flux density range of shoulder,stir pin's side and bottom generating heat quantity is uncertain,which needs certainty through verification,increases the difficulty and workload of modeling.For this problem,three-dimensional friction stir weld heat source model is established,and uncertain parameters in heat source model are determined.At the same time,effect of these parameters changing for welding temperature is researched in the simulation.In addition,according to the effect law of parameters changing,library of parameters of friction stir welding heat source is established and inference rules are designed.Friction stir welding of aluminum alloy heat source model expert system of fast establishing model are achieved.Finally,temperature field results of friction stir welding experiment have validated expert system function.Expert system significantly reduce difficulty of numerical simulation of friction stir welding,and is beneficial to promote the popularization and application of numerical simulation technology of friction stir welding of aluminum alloy.
作者
刘安
胡广旭
董志波
LIU An;HU Guangxu;DONG Zhibo(Department of Mechanical,Harbin University of CommeCommerce,Haerbin 150028,China;State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Haerbin 150001,China)
出处
《电焊机》
2021年第2期10-16,I0003,共8页
Electric Welding Machine
基金
黑龙江省青年创新人才培养计划(UNPYSCT-2018133)。
关键词
搅拌摩擦焊
铝合金
热量
热流密度
专家系统
friction stir welding
aluminum alloy
heat quantity
heat flux density
expert system
