海底复合管S型铺管状态下的应力分析Stressanalysisofcladpipe.pdf

海底复合管 S 型铺管状态下的应力分析 1 1 1 2 [李兵 ，赵海斌 ，段鹏 ，魏斌 ] [1：西安交通大学机械制造系统工程国家重点实验室，西安，710049] [2：中国石油天然气集团公司管材研究所，西安，710065] [ 摘 要 ] 海底复合管在采用 S 型铺管法铺设时，将同时受到弯矩、轴向拉力和海水拖曳力作用，严重威 胁其安全性，因此开展海底管道铺管状态下力学特性研究显得尤为重要。本文将利用 ANSYS 软件，分析不同型号的双层复合管在采用 S 型铺管法铺设时，静水中和动水中的变形及应力。 重点分析了双层复合管中内衬管与外套钢管之间的剪切应力。计算中考虑了管道类型变化、水 深变化和管道张紧力变化等多种铺设工况，获得了不同的管道类型、水深以及管道张紧力与管 道变形、应力的关系曲线。研究工作和分析结果将为海底管道的 S 型铺设技术提供理论依据和 设计参考。 [ 关键词 ] 复合管道；S 型铺管法；应力分析 Stress analysis of clad pipe under the sea with S-lay method 1 1 1 2 [Li Bing , Zhao Haibin , Duan Peng , Wei Bin ] [1: State Key Laboratory for Manufacturing systems Engineering, Xi’an, 710049] [2: Tubular Goods Research Center, CNPC, Xi’an, 710065] [ Abstract ] The clad pipe, which uses the S-lay method under the sea, will be affected by bending moment, axial tension and seawater drag at the same time and its safety faces great challenge. So the mechanical characteristics research on the clad pipe is very important. This paper will use ANSYS to calculate the deformation and stress of different clad pipes in both steady water and moving water. Especially we will focus on the shear stress between liner pipe and outer steel pipe. Calculations take the changes of pipe type, water depth and tension into account. We also find the curves which can describe the relationship between pipe type, water depth, tension, deformation and stress. The research and analysis for the S-lay method can provide a the