基于SYSWELD的预热温度对焊接热输入影响的有限元模拟  

Finite Element Analysis on Influence of Welding Heat Input Under Different Preheat-temperatures Based on SYSWELD Software

作　　者：陈智[1,2] 焦向东[2] 罗雨[2] 韩素新[2] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249 [2]北京石油化工学院能源工程先进连接技术北京市工程研究中心,北京102600

出　　处：《热加工工艺》2014年第15期164-166,共3页Hot Working Technology

基　　金：国家自然基金项目(51109005);国家青年科学基金项目(51305037);北京市自然科学基金项目;北京市教育委员会科技计划重点项目(KZ201210017017);北京市教委项目(KM201310017007)

摘　　要：采用数值模拟方法在有限元软件SYSWELD中建立了焊接三维有限元模型,利用非线性材料热物性参数和双椭球移动热源作为热传递方程的边界条件,得到了在不同预热温度条件下能熔透母材的最低焊接线能量。采用材料为API X65钢进行实验验证,表明模拟结果和实验结果基本吻合,为预热条件下采用合适的焊接工艺提供了科学的指导依据。A 3-D finite element model for the welding was established in SYSWELD software by numerical simulation. Nonlinear material thermal parameters and translate double ellipsoid heat source were used as boundary conditions in the heat transfer equation. The minimal welding line energy which can penetrate the base material under different preheat-temperatures can be obtained. Using API X65 steel material for experimental verification, it demonstrates that the simulation result is in agree with the experimental one. So this method can be a scientific guidance to provide a suitable welding process for the welding under preheat-temperature.

关 键 词：数值模拟 预热温度 焊接线能量 边界条件 

分 类 号：TG402[金属学及工艺—焊接]