摘要
运用有限元数值分析方法及双椭球体热源模型,通过制定不同的工艺方案,建立筒体与法兰环焊缝焊接模型,并对不同工艺方案条件下的应力场和变形场进行数值分析。结果表明:采用多道对称焊接,增加焊缝分段数,避免在刚性薄弱的缺口处起焊,都可以减少法兰的轴向翘曲变形和径向变形,降低焊后残余应力,但残余应力和法兰面径向变形的减小量并不明显。
This paper makes different process scheme using finite element method and double-ellipsoidal heat source model, and builds the girth weld welding model. The numerical simulation of the stress field and deformation field is carried out under different process conditions. The results indicate that the axial direction warping deformation and the radial deformation of the flange can be reduced by the multi-channel symmetry welding or increase of weld section number, and avoiding welding in the rigid weak gaps. The residual stress after welding can be reduced, but the residual stress and the decrease of flange＇s radial deformation is not obvious.
出处
《机械工程师》
2016年第5期114-116,共3页
Mechanical Engineer
关键词
环焊缝
数值模拟
残余应力
变形
circumferential weld
numerical simulation
residual stress
deformation
作者简介
焦俊锋（1978-），男，工程师，从事金属材料热处理及焊接技术工作。
