摘要
由于管道内介质流速高,易对弯管外拱内壁位置冲刷引起管壁减薄或产生凹坑,降低弯管的承压能力,影响管道安全运行。本文以某输气增压站内的90°长半径弯头为研究对象,采用有限元方法对其极限承载能力进行分析,并研究了缺陷长度、深度、弯管径厚比等参数对塑性极限载荷的影响规律。基于大量有限元结果拟合得到含缺陷弯管的塑性极限内压计算公式,为含缺陷弯管安全评估提供初步评判依据。
Due to the high flow velocity of medium in the pipe elbows,it is easy to flush the inner surface of extrados,causing the wall to be thinned or pitted.Therefore,the 90°long radius elbow in a gas transmission booster station is taken as the research object,and the plastic limit load is analyzed by finite element method.The effects of parameters such as length,depth,and diameter to wall thickness ratio on the ultimate load of the elbow containing the defect are studied.Based on a large number of finite element results,the plastic limit load solutions of elbows with a single defect located on extrados are proposed,which provides a preliminary evaluation basis for the safety assessment of the defective bend.
作者
丁宁
吴瑶晗
刘慧
吴霞
Ding Ning;Wu Yaohan;Liu Hui;Wu Xia(Sinopec Sichuan-East Gas Transmission Branch,Hubei Wuhan 430020;Petroleum Engineering School,Southwest Petroleum University,Chengdu Sichuan 610500)
出处
《石化技术》
CAS
2020年第11期109-110,共2页
Petrochemical Industry Technology
关键词
体积型缺陷
弯管
极限内压
有限元
塑性失效
Volumetric defect
Elbow
Ultimate internal pressure
Finite element
Plastic failure
作者简介
丁宁(1975-),男,学士,高级工程师,主要从事油气管道工程、油气储运安全技术;通讯作者:刘慧(1996-),女,硕士研究生,主要从事油气储运安全技术。
