基于焊缝形状的二维焊接温度场模拟热源模型  

Heat source model for 2D welding temperature field simulation based on the configuration of welding line

作　　者：刘川[1] 张建勋[1] 张林杰[1] 

机构地区：[1]西安交通大学焊接研究所,陕西西安710049

出　　处：《材料热处理学报》2008年第2期177-180,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50475093);中国机械工程学会焊接分会创新思路预研经费资助(07-12-003)

摘　　要：焊接温度场数值模拟准确性是焊接应力变形数值的前提。二维模型由于其计算效率高是焊接过程有限元数值模拟的常用模型。然而,三维热源转变为施加在二维平面上的热源需要进行修正。本文提出基于焊缝几何形状的用于二维焊接温度场模拟的热源模型,根据焊缝几何形状来计算热源作用体积,并考虑了焊接移动热源对二维平面的作用,采用高斯分布函数来表征热源在时间上的变化。采用该热源模型对不锈钢板多道对接焊和p91管对接焊的温度场模拟,模拟结果和试验结果符合较好。The Accuracy of welding temperature simulation is the basis of the welding stress and deformation simulation.2D finite element（FE） model is the common model for welding simulation for its short time cost.However,the heat source model,transformed from 3D model,must be modified when applying to 2D FE model.This paper suggests a heat source for 2-D arc welding temperature simulation based on the configuration of the welding line.The intensity of heat source changing with time is expressed by Gauss function to achieve the moving of the heat source on 2D plane.The computed temperature results using the proposed heat source model fit quite well with the experimental results.

关 键 词：焊接 有限元 温度模拟 热源模型 焊缝 

分 类 号：TG402[金属学及工艺—焊接]