摘要
铁路客车侧墙薄板结构的焊接变形主要是焊后失稳变形,通过选择包括连续焊、电铆焊、断续焊和塞焊代表性的区域,利用热—弹塑性数值模拟与解析法相结合的方法,计算薄板结构的焊后失稳变形.结果表明,横向加强筋和纵向加强筋与薄板连接时所采用的断续焊和塞焊工艺是产生薄板失稳变形的主要原因.薄板自由边的存在明显降低失稳载荷,增大失稳变形量.对焊接变形进行了实地测量,模拟结果与测量结果相吻合,说明数值模拟具有可靠性.
The main welding deformation of railway carriage side-wall was welded buckling distortion,which was simulated by thermal elastic-plastic finite element method with analysis in several selected areas including continuous welds,plug welds and intermittent welds.The results show that the plug welding and intermittent welding are the main reason that induce bucking distortion of side-wall,in which transverse stiffeners and longitudinal stiffeners are welded on the side-wall.The critical bucking load decreases obviously and the bucking distortion increases on the plate with a free boundary.The measured results of bucking distortion are in agreement with the simulation results.Thus,a complete set of instruction can be received for the real processing.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第5期109-112,共4页
Transactions of The China Welding Institution
关键词
客车侧墙
数值模拟
失稳变形
carriage side-wall
numerical simulation
buckling distortion
