摘要
建立了ＧＴＡ焊接过程电弧与熔池双向耦合统一数学模型．该模型考虑了熔池自由表面变化对电弧和熔池的影响，并通过不断更新自由表面形状实现了电弧与熔池相互耦合．电弧和熔池的两组控制及辅助方程采用有限差分法进行求解．计算中采用了适体坐标系以确定不断变化的自由表面形状．用所建模型对３０４不锈钢材料的定点ＧＴＡ焊接过程进行了数值计算分析，取得了良好效果．
A mathematical model to describe heat transfer and fluid flow in mutually coupled weld pool and arc by the interactive free surface of the pool for a stationary gas tungsten arc welding (GTAW) is developed. The two sets of governing equations and auxiliary formulas, controlling the weld pool and plasma arc systems respectively, were solved by a finite difference method. A boundary-fitted coordinate system was adopted because the free surface has a curved and unknown shape during welding. The numerical model was applied to AISI 304 stainless steel alloys. The,results provide a fundamental basis for predicting the behavior of an integrated weld pool and arc system from first principles.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第5期537-542,共6页
Acta Metallurgica Sinica
基金
国家973项目"新一代钢铁材料重大基础研究" G1998061500
留学回国人员基金资助项目
