【作者】 许诚； 惠虎； 黄淞； 宫建国；

【Author】 Xu Cheng;Hu Hui;Song Huang;Jian Guo Gong;School of Mechanical and Power Engineering,East China University of Science and Technology;

【机构】 华东理工大学机械与动力工程学院；

【摘要】 爆破片作为一种重要的承压设备超压泄放装置,其抗疲劳性能是工程中十分关注的问题。爆破片工作状态下应力状态受到载荷、安全泄放装置约束尺寸的影响,不当的爆破片安全泄放装置结构尺寸对其抗疲劳性能具有不可忽视的影响。本文采用数值分析方法,针对LPTA25-17.2-316L等型号爆破片,开展了循环应力工作状态下典型正拱形爆破片的弹塑性应力分析,得到了爆破片的应力分布,比较了不同厚度及不同压环圆角半径条件下爆破片拱顶位置与边缘压环圆角处的应力强度,结果表明:爆破片拱顶部的应力强度随着压环圆角的增大而增大,边缘位置的应力强度随着压环圆角的增大而减小,通过设计合适的安全泄放装置压环圆角,限制爆破片边缘应力强度低于拱顶应力强度,对于提升正拱型爆破片抗疲劳性能具有重要意义。更多还原

【Abstract】 As an important pressure-bearing equipment overpressure relief device,fatigue resistance of rupture disc is a major concern for its application in pressure vessels and piping.The stress state of the rupture disc in the working state is affected by the load and the restraint size of the safety relief device,and the improper structure of the safety relief device of the rupture disc has a nonnegligible effect on its fatigue resistance.Numerical analysis method is used to carry out the elasticplastic stress analysis of the typical arched rupture disc of model LPTA25-17.2-316 L and other models under the working condition of cyclic stress,and the stress distribution of the rupture disc is obtained in this paper.The stress intensity at the dome and the holder fillet radius position of the rupture discs with different thicknesses and different holder fillet radius are compared in this paper.Results show that the stress intensity at the top of the rupture discs increases with the increasing of holder fillet radius,and the stress intensity at the edge position decreases with the increasing of the holder fillet radius.By designing appropriate holder fillet of safety relief device to limit the ’stress intensity at the edge of the rupture disc to be lower than that at the top,which is of great significance for improving the fatigue resistance of the normal arch rupture disc.更多还原