水下焊接温度场数值模拟  

Numerical Simulation on Temperature Field Underwater Welding

作　　者：刘习文[1] 刘超英[1] 

机构地区：[1]肇庆学院电子信息与机电工程学院,广东肇庆526061

出　　处：《热加工工艺》2015年第17期225-228,共4页Hot Working Technology

基　　金：肇庆学院科研基金资助项目(201440)

摘　　要：分析了水下焊接温度场热源分布模式,选择双椭圆高斯体作为热源分布模型。讨论了影响水下焊接温度场的几个因素;水对电弧热效率影响不大,对流系数随着工件和水之间的温度差变化而变化,水对流使得熔池迅速凝固。使用ANSYS软件作为数值模拟工具,利用APDL语言编写了热源加载子程序和施加变化对流系数的子程序。试验表明,计算结果与实测结果误差较小。The heat-input model in underwater welding temperature field was analyzed, the double ellipsoid Gauss model were proposed as heat source model. Several factors which affect the temperature field of underwater welding were analyzed. Water has little influence on the arc thermal efficiency. Water convection coefficient changes with the temperature difference between the workpiece surface and water. Water convection makes molten pool freeze quickly. ANSYS software was used as numerical simulation tool, and ANSYS Parametric Design Language was used to develop subprograms for loading the moving heat sources and various convection coefficients. The results show that the computational results have little difference with the actual results.

关 键 词：水下焊接 温度场 热源模型 水对流 

分 类 号：TG402[金属学及工艺—焊接]