| 考虑轴向荷载和外压影响的非黏结柔性管道骨架层失效分析 |
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| 引用本文： | 陈严飞,刘昊,曹静,孙伟栋,覃雯琪,阎宇峰,何明畅,宗优.考虑轴向荷载和外压影响的非黏结柔性管道骨架层失效分析[J].海洋工程,2022,40(1):125-133. |
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| 作者姓名： | 陈严飞 刘昊 曹静 孙伟栋 覃雯琪 阎宇峰 何明畅 宗优 |
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| 作者单位： | 中国石油大学(北京)油气管道输送安全国家工程实验室/石油工程教育部重点实验室/城市油气输配技术北京市重点实验室,北京 102200;大连理工大学 工业装备结构分析国家重点实验室,辽宁 大连 116024;中国石油大学(北京)油气管道输送安全国家工程实验室/石油工程教育部重点实验室/城市油气输配技术北京市重点实验室,北京 102200;中海油研究总院,北京 100024;中集海洋工程有限公司,广东 深圳 518000 |
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| 基金项目： | 国家自然科学基金(51779265, 52171285)；大连理工大学工业装备结构分析国家重点实验室开放基金(GZ19119)；广东省促进经济发展专项资金(海洋经济发展用途)(GDOE[2019]A39) |
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| 摘 要： | 非黏结柔性管道骨架层由不锈钢材料互锁缠绕而成,主要用于抵抗外压防止软管发生压溃失效.骨架层失效是柔性软管故障的最大风险,骨架层失效模式主要分为压溃失效和拉伸失效.采用非线性有限元方法并且考虑几何大变形、材料非线性、接触和摩擦等非线性效应的影响,对"S"型骨架层结构建立三维有限元模型,进行了单外压作用下的压溃失效分析和单一轴向拉力作用下的拉伸失效分析,而后开展轴向拉力和外压载荷组合作用下骨架层压溃失效分析.结果表明轴向拉力会一定程度上降低骨架层压溃承载力,相关结论可以为柔性软管结构设计和完整性评价提供参考.
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| 关 键 词： | 非黏结柔性管道 骨架层 轴向极限承载力 压溃失效 压溃压力 |
| 收稿时间： | 2021/2/19 0:00:00 |
Collapse failure of carcass for un-bonded flexible pipe considering axial loading and external pressure |
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| CHEN Yanfei,LIU Hao,CAO Jing,SUN Weidong,QIN Wenqi,YAN Yufeng,HE Mingchang,ZONG You.Collapse failure of carcass for un-bonded flexible pipe considering axial loading and external pressure[J].Ocean Engineering,2022,40(1):125-133. |
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| Authors: | CHEN Yanfei LIU Hao CAO Jing SUN Weidong QIN Wenqi YAN Yufeng HE Mingchang ZONG You |
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| Institution: | National Engineering Laboratory for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102200, China;State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116024, China;CNOOC Research Institute, Beijing 100024, China;CIMC Offshore Co., Ltd., Shenzhen 518000, China |
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| Abstract: | The innermost carcass layer of the un-bonded flexible pipe is made of stainless steel interlocked and wound, and is mainly used to resist external pressure and prevent the pipeline from collapse. Carcass failures have over the last years been the largest failure category for flexible pipes. The failure modes of the carcass layer are mainly divided into collapse failure and tensile failure. Nonlinear finite element method is used and geometrical large deformation, material nonlinearity complex contact and friction are considered in this paper. In order to determine the resistance to collapse and ultimate tensile force, a 3D analysis model of "S" carcass has been built. The collapse failure analysis under a single external pressure and the tensile failure analysis under a single axial tension are carried out. Then the collapse failure analysis of the carcass under the combined action of axial tension and external pressure load is carried out. The results show that the axial tension will reduce the collapse bearing capacity of the carcass to a certain extent, and the relevant conclusions can provide reference for the design of flexible pipe structure and integrity evaluation. |
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| Keywords: | unbonded flexible pipelines carcass ultimate tensile force collapse failure collapse pressure |
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