大型多焊缝结构焊接残余应力计算方法研究  

Research on welding residual stress calculation of large and multi-weld structure

作　　者：荆慧强[1] 贾延奎[1] 刘国英[1] 刘奇[1] 何冠杰[1] 

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《焊接技术》2017年第2期23-26,共4页Welding Technology

摘　　要：基于有限单元法对HG785高强度焊接钢的多焊缝结构焊接残余应力进行了数值计算,分别提取了横向和纵向焊接残余应力值,得到试样残余应力的分布规律。为验证该方法的有效性,采用X射线法对该焊接结构件进行了残余应力测试,并与数值模拟结果进行对比分析。分析结果表明,该计算方法可以较好地预测大型多焊缝结构焊接残余应力的分布,同时计算效率高,操作简单,便于工程应用。The welding residual stress of HG785 steel structure including multi-weld was calculated with a kind of method based on finite element method, and the values were extracted in two directions to get a sample of residual stress distribution. To verify the validity of the method, experiments were taken to measure the welding residual stress by the X-ray measurement. Finally, the computed and the experimental results were compared and analyzed.The results showed that the calculation method could predict the trend of the welding residual stress well. This method used herein was simple to be operated and with high computational efficiency, meanwhile, convenient for engineering applications.

关 键 词：HG785钢 多焊缝 残余应力 有限单元法 

分 类 号：TG404[金属学及工艺—焊接]