Q345B厚板T型头CO_2气体保护焊温度场的数值模拟与分析  

Numerical Simulation and Analysis of CO_2 Arc Welding Temperature Field for Q345B Plate T-joint

作　　者：王栋[1] 肖波[1] 宋志东[1] 何宗海[1] 

机构地区：[1]郑州大学机械工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2015年第2期18-21,32,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家高技术研究发展计划资助项目(863计划)(2012AA041801);河南省教育厅科学技术研究重点项目(14A460001)

摘　　要：基于商用有限元软件ANSYS的APDL语言,选用适用于CO2气体保护焊的双椭球热源模型,建立Q345B厚板T型接头多层多道焊的有限元模型,采用单元生死技术,通过编制子程序逐层逐段地激活焊缝单元来模拟焊缝材料的填充过程,得到不同焊接速度下模型温度场的分布情况以及模型典型位置的热循环曲线,并通过实验验证了仿真结果,证明了焊接模拟的可靠性,为实际焊接过程分析提供一定的理论帮助.Based on the APDL（ANSYS Parametric Design Language） of commercial finite element software ANSYS and selecting the double-ellipsoid heat source model,the finite element model of Q345B plate T-joint multi-layer and multi-pass welding is created. With the element birth and death technology and simulating the filling process of weld material by programming subroutine which activates the welding element step by step. The temperature field distribution regularities of the model under different welding speeds are analylized and worked out the thermal cycling curves of typical positions. The simulation results are verified through experi- ment which prove the reliability of the welding simulation and provide some theoretical help to analysis the ac- tual welding process.

关 键 词：CO2气体保护焊 T型接头 单元生死技术 温度场 

分 类 号：TG402[金属学及工艺—焊接]