基于Sysweld的T形管焊接件温度及应力应变场数值模拟分析  

Numerical simulation analysis on T-shaped pipe weldments temperature and stress-strain field based on SYSWELD

作　　者：李智钟[1] 周建平[1,2] 许燕[1] 李丙如 

机构地区：[1]新疆大学机械工程学院,新疆830047 [2]西安交通大学机械工程学院,西安710049

出　　处：《焊接学报》2016年第4期77-80,94,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51365053);自治区科技支疆资助项目(201491124)

摘　　要：采用双椭球体热源分布模型,基于Sysweld软件平台,对常用的暖气运输管道中T形管焊接过程进行数值模拟仿真.首先通过UG建立三维模型并导入Hypermesh进行了网格划分,之后在Sysweld中对焊接过程进行模拟仿真,获得了温度场及应力应变场的分布情况.然后对焊接过程温度云图及焊件整体形变进行了详细的分析.结果表明,热源处的温度达到2 500℃左右,在焊缝周围形成了明显的热影响区;并在焊缝区域出现应力集中情况,其最大应力为277 MPa,在其材料的屈服应力范围内(345 MPa);且在焊缝处出现下凹现象,最大变形量为0.29 mm.此次分析为实际焊接提供理论依据.The welding process of frequently-used Tshaped pipe in heating transportation pipeline was numerically simulated.Based on the SYSWELD software platform,the double ellipsoid heat source distribution model was used.Firstly,the three-dimensional model was built by UG and the mesh for the model was divided by hypermesh,then the welding process was simulated by SYSWELD.The distribution of temperature and stress-strain fields were obtained.The temperature contour and the overall deformation of the welding parts in the welding process were analyzed in details.The results show that the temperature of the heat source can reach as high as 2500 ℃.The heat affected zone is obviously formed around the weld.Stress concentration appears in the weld area.The maximum stress is277 MPa,which is within the material's yield stress that is 345 MPa.The phenomenon of concave is appeared in the weld.The maximum deformation is 0.29 mm.The analysis provides a theoretical basis for the actual welding.

关 键 词：T形管焊接 数值模拟仿真 热影响区 双椭球热源模型 

分 类 号：TG446.1[金属学及工艺—焊接]