摘要
压力容器不断向大型化、复杂化方向发展,特别是应用于空气动力试验、核电工程、热电工程等的大型复杂压力容器,其内含缺陷具有先天性与后发性、多样性与复杂性、隐蔽性与突现性等特点,由此引起的重大安全事故多发,压力容器缺陷安全程度的研究一直是该领域关注的重点。从R6失效评定图出发,比较了国内外压力容器安全评价的研究进展,对比阐述了压力容器安全裕度研究的不同方法。针对射线法等传统评定方法对缺陷安全裕度及剩余寿命估算不能反映缺陷安全衰减路径与扩展速率的时变性问题,重点介绍了基于衰减路径速度积的新方法,并推导出速度积和安全裕度的计算公式。
Nowadays,the size of pressure vessel is getting larger and its mechanism is becoming increasingly complicated,,especially the inherent defects of pressure vessels used in aerodynamic tests,nuclear power projects,thermoelectric projects are characterized by congenital and late onset,variety and complexity,invisibility and burstiness,which lead to major accidents frequently.Therefore,study on the safety assessment of pressure vessel defects has been the focus in this field.This paper shows the research advance on safety assessment of pressure vessel and compares the evaluation methods of pressure vessel safety margin based on the R6 failure assessment diagram.Considering that the estimation of the defect safety margin and the vessel’s residual life made by traditional methods such as double-criterion failure assessment ray method cannot reflect the time-varying problem of safety attenuation path and propagation rate,a new safety assessment method based on the product of attenuation path and velocity is proposed,and the calculation formulas of the product of attenuation path and velocity and safety margin are derived.
作者
谢阳
龙伟
赵波
刘华国
XIE Yang;LONG Wei;ZHAO Bo;LIU Huaguo(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;Sichuan Provincial Key Laboratory of Advanced Manufacturing Technology,Chengdu 610065,China)
出处
《机械》
2019年第11期8-15,28,共9页
Machinery
基金
国家自然科学基金（5187051962）
四川省自然科学基金项目（2019YFG0347）
关键词
压力容器
衰减路径
安全评定
安全裕度
路径速度积
pressure vessel
attenuation path
safety assessment
safety margin
product of attenuation path and velocity
作者简介
谢阳(1995-),男,四川成都人,硕士研究生,主要研究方向为压力容器裂纹缺陷。;通讯作者:赵波(1972-),男,吉林长岭人,工学博士,教授,主要研究方向为结构轻量化设计、压力容器裂纹缺陷安全评定、矿车总体设计和露天矿卡车调度系统建模等。
