摘要
运用有限元法对压力管道在线焊接的温度场和应力场进行数值模拟,考虑随温度变化的材料性能以及对流辐射的影响,计算结果与无管内介质流动的情形进行比较。结果表明,管内流动的介质带走了焊接时的大量热量,加速管壁的冷却,管内壁的峰值温度远低于无介质流动时;介质压力对完全冷却后的轴向应力产生较大影响。
The temperature field and stress distribution of in-service welding on pressurized pipeline were simulated by FEM（finite element method）. Temperature dependent material properties were considered as well as convection and radiation as boundary conditions. And the results were compared with those of the no-flow situation. It can be concluded that the flowing media took away most heat. The cooling of pipe wall is accelerated and the peak temperature of inner surface of the pipe is much lower than that of no-flow situation. The axial stress distribution after cooling is changed greatly under internal pressure.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2007年第1期118-123,共6页
Journal of Mechanical Strength
基金
中石化集团公司基金资助项目(304001)
南京工业大学博士学位论文创新基金(BSCX200511)资助~~
关键词
在线焊接
温度场
应力场
数值模拟
In-service welding
Temperature fields
Stress fields
Numerical simulation
