基于相似理论的构件与模拟件之间焊接残余应力关系的建立  

Establishment of relation about welding residual stress between simulative component and practical component on basis of similitude principles

作　　者：姬书得[1] 张利国[1] 李雅范[2] 刘雪松[2] 方洪渊[2] 

机构地区：[1]沈阳航空工业学院航空宇航工程学院,沈阳110034 [2]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001

出　　处：《焊接学报》2010年第6期61-64,共4页Transactions of The China Welding Institution

基　　金：现代焊接生产技术国家重点实验室开放课题研究基金资助项目

摘　　要：以相似理论为基础,提出了基于温度场完全相似的虚拟模拟件的概念,结合热传导理论得到的表征模拟件与实际结构之间焊接残余应力差异的应力修正系数,推导出了模拟件与实际结构之间焊接残余应力对应关系的数学表达式.同时,利用比例系数为1∶1.5的平板模拟件与实际平板的焊接试验证实了焊接残余应力对应关系的正确性.这为缩小的物理模型预测大型实际构件的应力分布规律提供了一种新思路,具有重要的理论意义与实际工程意义.On basis of the similitude principles,the conception of virtual simulative component and the auxiliary value of welding residual stress are deduced by the welding conduction theory,and the relation of the welding residual stress between the simulative component and the practical component is attained. Moreover,the welding experiment about the simulative plane and the practical plane proves the correctness of the relation,which the proportionality coefficient of dimensions between the simulative plane and practical plane is 1:1.5. This provides a new idea to predict the welding stress distribution of large practical structure by the contractible physical model and has owns important theory meaning and practical engineering significance.

关 键 词：相似理论 热传导理论 模拟件 焊接残余应力 

分 类 号：TG156[金属学及工艺—热处理]