作　　者： ; ;

机构地区： 集美大学轮机工程学院

出　　处： 《焊接学报》 2011年第5期77-80,117,共4页

摘　　要： 采用结构力学理论与方法,对结构焊接变形进行了有限元数值模拟.将焊缝等效为残余应力与残余应变,其中,将T形接头视为板条梁,采用热弹塑性有限元分析方法分析了焊后残余应力分布特征和残余应变分布.根据虚功原理将焊缝残余应力等效加载到结构上与焊缝邻近的节点处,采用位移法将残余应变等效加载到结构相应部位.然后采用结构有限元分析方法对焊接结构进行有限元分析,得到其焊接变形数据.方法高效、加载简便,与实际结构生产经验数据比对结果验证了方法的有效性. Some theories and methods of structure mechanics were applied to simulate the efficiently welding deformation.Since the seam size is too small to contribute itself to the strengthen of huge construction,it can be replaced by residual strain and stress in complicated welded structure in order to improve the quality of ANSYS meshing and save calculating time.Residual stress and strain distributions obtained by thermal elastic and plastic finite ANSYS method were analyzed,respectively.The principle of virtual work and the displacement method were used to load the residual stress and strain of weld seam on the corresponding node in welded structure,which made the stress and strain loading process more convenient and useful.The deformation of welded structure in simulation was proved by comparing the experience data.It was proved that the method to simulate the welding deformation based on the principle of virtual work and the displacement method can be used to predict the deformation of complicated welded structure.

关 键 词： 虚功原理 力学位移法 焊接变形 数值分析

领　　域： [金属学及工艺]