基于SYSWELD的GTAW三维动态熔池形状的有限元模拟  

Finite element analysis on 3-D molten pool geometry for GTAW based on SYSWELD software

作　　者：李瑞英[1] 赵明[2] 周鸿雁[1] 

机构地区：[1]大庆师范学院物理与电气信息工程学院,黑龙江大庆163712 [2]中国石油大学机电工程学院,山东东营257061

出　　处：《焊接学报》2011年第4期41-44,115,共4页Transactions of The China Welding Institution

基　　金：青岛市科技发展计划项目(09-1-3-37-jch);大庆师范学院自然科学基金资助项目(09ZQ07;08ZQ08);中国石油大学博士科研基金资助项目(Y070305)

摘　　要：基于双椭球体热源模型,建立了运动电弧作用下的GTAW焊接不锈钢0Cr18Ni9薄板三维瞬态焊接热过程的数值分析模型.考虑了材料的热物理性能参数、相变潜热与温度的非线性关系,给出了应用SYSWELD软件的校正工具对热源分布参数进行确定的方法.将熔池形状的有限元解同试验结果进行了比较,计算所得熔池形状与实测结果吻合较好,证明了双椭球体热源模型能够较好地反映GTAW电弧的热流密度分布.A 3-dimensional transient numerical simulation model for gas tungsten arc(GTA) welding 0Cr18Ni9 stainless steel sheet was developed based on SYSWELD software.A double ellipsoid heat source mode was adopted to depict the distribution of a moving GTA welding arc.The method modified the parameters of heat source was put forward.The thermo-physical properties and latent heat were taken into consideration.The transient variations of temperature fields and molten pool geometry were predicted and verified.It has been found that the calculated shape of molten pool was in agreement with the experimental one.

关 键 词：双椭球体热源模式 熔池形状 有限单元法 数值模拟 

分 类 号：TG444.74[金属学及工艺—焊接]