文献类型：期刊文献

中文题名：含体积型缺陷管线的极限载荷分析

英文题名：THE COLLAPSE LOAD OF CIRCULAR ARCH PIPE WITH 3D DEFECTS

作者：张慧敏[1,2];潘家祯[2]

机构：[1]上海应用技术学院机械与自动化工程学院,上海200233;[2]华东理工大学机械与动力工程学院,上海200237

年份：2009

卷号：26

期号：8

起止页码：20

中文期刊名：工程力学

外文期刊名：Engineering Mechanics

收录：CSTPCD;;EI(收录号：20093712302335);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：极限载荷;拱形管;爆破试验;非线性有限元分析;体积形缺陷

外文关键词：collapse load; circular arch pipe; burst test; nonlinear finite element method; volume defects

摘要：体积型缺陷特别是凹坑缺陷是管线腐蚀最常见的一种形式。该文对含凹坑缺陷的直管与弯管进行了内压爆破试验,缺陷形状为球形、沿轴向与环向分布的椭球形,载荷为内压,极限压力的求解方法有GB/T19624-2004(直管)、大变形非线性弹塑性有限元分析。有限元失效模拟的结果与爆破试验结果吻合较好。通过有限元方法与试验的分析,发现缺陷沿轴线分布对极限压力影响较大,并建立了直管与弯管含体积型缺陷的内压极限载荷估算式。
The volume defects, especially the pitting defects, are very common when the pipeline is corroded. The burst test is performed on the straight and circular arch pipes, which have pitting defects and are subjected to internal pressure. The shape of defects is spherical and long spherical in axial and circular directions. The collapse pressure is calculated by large displacement nonlinear elastic-plastic finite element method and GB/T19624-2004 （in straight pipe）. The numerical results and failure modes of finite element method are in good agreement with burst tests. The finite element method and the burst test result both show that the defects in axial direction have larger influence on the collapse load. The calculation formulas of plastic limit load for bent and straight pressured pipeline with 3D defects are put forward.