双椭球热源参数的敏感性分析及预测  

Sensitivity analysis and prediction of double ellipsoid heat source parameters

作　　者：李培麟[1] 陆皓[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240

出　　处：《焊接学报》2011年第11期89-91,95,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50975176)

摘　　要：双椭球模型是在电弧冲击力较大的情况下常用的热源模型.通过研究双椭球热源模型的参数对焊接熔宽、熔深的影响,获得双椭球热源模型的形状参数在埋弧焊中的敏感性.并为了研究特定熔宽与熔深情况下对应的热源模型参数,采用多元回归分析,提出了敏感性分析的经验公式,获得了熔宽熔深与热源参数之间的关系.通过回归获得的经验公式,可以在已有熔宽熔深试验结果的条件下获得对应的热源参数,简化热源模型的试算过程,提高了模拟的效率和精度.When the arc force is strong,the double ellipsoid heat source model is the most widely used heat source model.The influence of the heat source parameters on the weld size was researched,and the sensitivity of the double ellipsoid heat source parameters was obtained for SAW.The multiple regression analysis was applied to research the relationship between the weld size and the heat source parameters.An empirical formula was put forward,and the heat source parameters corresponding to the weld width and penetration can be easily calculated by the empirical formula.The trial time is reduced and the simulation precision is increased.

关 键 词：埋弧焊 双椭球热源 敏感性 多元回归 

分 类 号：TG402[金属学及工艺—焊接]