含初始水平不直度海底双层管道侧向屈曲参数分析  

Parametric Analysis for Lateral Buckling of Subsea Pipe-in-Pipe System with Initial Horizontal Out-of-Straightness

作　　者：余志兵[1] 何杨[1] 黄卫国 高嵩[1] 赵党[1] YU Zhibing;HE Yang;HUANG Weiguo;GAO Song;ZHAO Dang(Offshore Oil Engineering Co.,Ltd.,Tianjin 300452,China;Tianjin Branch,CNOOC(China)Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]海洋石油工程股份有限公司,天津300452 [2]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《中国海洋平台》2024年第6期91-95,106,共6页China offshore Platform

基　　金：国家重点研发计划“深水海洋管道基于应变设计及高应变海洋管技术”(编号:2018YFC0310301)。

摘　　要：建立平坦海床上不埋设海底双层管道的非线性数值计算模型,采用有限元法分析初始水平不直度和管-土相互作用参数对海底双层管道侧向屈曲的影响。结果表明:管道初始缺陷幅值和波长越大,侧向位移越大,管道屈曲变形更集中;当缺陷波长和缺陷幅值恒定时,若增大土壤摩擦因数,管道屈曲段长度随之缩短。研究结果对海底双层管道的设计和工程建设具有指导意义。A nonlinear numerical analysis model for unburied subsea pipe-in-pipe system on a flat seabed is established.The finite element method is used to analyze the effects of initial horizontal out-of-straightness and parameters for pipe soil interaction on the lateral buckling of the subsea pipe-in-pipe system.The results indicate that:the larger the initial defect amplitude and wavelength of the pipeline,the greater the lateral displacement,and the more concentrated the buckling deformation of the pipe-in-pipe system;when the wavelength and amplitude of imperfection is constant,if the soil friction factor is increased,the length of the buckling segment of the pipe-in-pipe system will be shortened.The research is of a guiding significance for the design and engineering development of the subsea pipe-in-pipe system.

关 键 词：海底双层管道 不直度 侧向屈曲 非线性 参数分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]