船用厚板焊接温度场演变规律  

Study on temperature field of welding process for marine thick plate

作　　者：殷苏民[1] 江文林[1] 王匀[1] 许桢英[1] 张超[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《电焊机》2013年第6期6-9,34,共5页Electric Welding Machine

基　　金：国家自然科学基金(51179076);江苏省"333工程"科研项目BRA2011180;省高校重点建设实验室基金资助项目(HGDML-1002)

摘　　要：船用厚板焊接过程复杂,建立符合焊接热过程的热源模型是温度场和应力场分析的关键。对厚板对接焊接工艺的温度场进行了数值分析,在分析各类热源模型的基础上,建立了面部加载高斯热源和双椭球热源以及组合热源的数学模型,获得了各热源下焊接过程中焊接温度场的发生、发展和分布规律,以及各个节点的热循环曲线变化规律。结果表明组合热源分析的准确性和适用性,为减小和控制焊接应力和变形提供依据。With welding thermal process,numerical analysis is complex and difficult,especially heat source model is the key to the analysis of temperature field and stress field.For the analysis of thick plate butt welding temperature field, three kinds of welding heat sources that are Gaussian heat source,the double ellipsoid heat source and the combined welding heat source are established.The results show that he combined welding heat source is more exactly than those using the other two heat sources, which provide a basis to reduce and control the welding stress and deformation.

关 键 词：数值分析 温度场 复合热源 

分 类 号：TG402[金属学及工艺—焊接]