摘要
采用商用ANSYS软件的二次开发语言,选用适宜于CO2气体保护焊的双椭球热源模型,建立了Y型坡口的两块钢板对接多层多道焊模型,分别采用三种不同"单元生死"技术对其温度场分布规律进行数值模拟及对比分析,验证了模拟过程中采用逐步、逐层激活焊缝单元的"单元生死"技术的必要性.得到了模型在各时间点的温度场分布,绘制了典型位置的热循环曲线,据此可掌握和预测实际焊接过程以及焊接之后焊件的组织、性能以及残余应力的变化情况.
With the developing language of ANSYS software and the using of the double-ellipsoid heat source model,a model of two steel plate that connected by Y groove multi-layer and multi-pass CO2 arc welding seam is created.Three different kinds of element birth and death technology are used separately in the model.After the comparison of three different numerical simulation results,the correctness of the element birth and death technology which activates the welding material step by step is validated.The temperature field distribution regularities of the welding at various time points of welding progress are analyzed.The cycling curves of typical spots on different place of the model are studied.Based on the results,the component’s tissue,properties and residual stress at different position of the model can be estimated.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2012年第4期41-45,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家科技部资助项目(2009GJD00041)
关键词
CO2气体保护焊
双椭球热源
单元生死
温度场
CO2 arc welding
double-ellipsoid heat source mode
element birth and death
temperature field
