J-lay铺管作业力学分析
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摘要
目前J-lay铺管法作为深水和超深水铺管的最适用方法广泛应用于深海油气开发。考虑J-lay铺管时管道几何非线性特征以及触地区边界效应,将J-lay铺管模型划分三构件进行力学分析:悬浮段、边界层段以及触地段。建立Orca Flex模型和引入Wang改进二构件模型,通过对比上述三种方法计算J-lay相应构型、轴力、弯矩和剪力分布,验证该三构件模型的可行性和考虑边界效应的必要性。基于Lamé公式计算管道横截面处轴向、径向以及环向应力,对比分析J-lay铺设管道应力分布特征。结果表明:该改进三构件模型能真实有效地模拟J-lay铺管过程中管道受力情况,特别是触地点附近弯矩和剪力变化情况,能为管道疲劳损伤分析提供理论基础。
Nowadays J-lay pipelaying method,as the most suitable pipelaying method in deepwater and ultra-deepwater,has been widely used in the deepwater oil and gas development.By taking account of pipeline geometrical nonlinearity and boundary effect in the touchdown zone during J-lay pipelaying operation,J-lay pipelaying model is divided into three segments to study:suspended segment,boundary-layer segment and touchdown segment.J-lay FEM is developed by Orca Flex software and the developed two-fields model proposed by Wang is also introduced.By comparing the results of the J-lay configuration,tension,bending moment and shear distributions obtained from the three methods above,it can strongly demonstrate the feasibility of the proposed three-fields model and the necessity of considering the boundary effect.Based on Lamé's equations,the axial,radial and hoop stresses on pipe cross section can be obtained and the corresponding stress distribution characteristics can also be derived.The results show that:the proposed three-fields model can realistically and effectively simulate the pipeline loading performance in J-lay pipelaying operation,especially for the variation of the bending moment and shear force near the touchdown point.It will provide a theoretical basis for pipeline fatigue damage analysis.
Nowadays J-lay pipelaying method,as the most suitable pipelaying method in deepwater and ultra-deepwater,has been widely used in the deepwater oil and gas development.By taking account of pipeline geometrical nonlinearity and boundary effect in the touchdown zone during J-lay pipelaying operation,J-lay pipelaying model is divided into three segments to study:suspended segment,boundary-layer segment and touchdown segment.J-lay FEM is developed by Orca Flex software and the developed two-fields model proposed by Wang is also introduced.By comparing the results of the J-lay configuration,tension,bending moment and shear distributions obtained from the three methods above,it can strongly demonstrate the feasibility of the proposed three-fields model and the necessity of considering the boundary effect.Based on Lamé's equations,the axial,radial and hoop stresses on pipe cross section can be obtained and the corresponding stress distribution characteristics can also be derived.The results show that:the proposed three-fields model can realistically and effectively simulate the pipeline loading performance in J-lay pipelaying operation,especially for the variation of the bending moment and shear force near the touchdown point.It will provide a theoretical basis for pipeline fatigue damage analysis.
引文
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[15]王小东,郭海燕,高秦岭,等.钢悬链线立管触地点区域管土相互作用的有限元分析[J].中国海洋大学学报:自然科学版,2010(S1):197-200.(WANG Xiaodong,GUO Haiyan,GAO Qinling,et al.Finite element analysis of steel catenary riser/seafloor interaction in the touch down zone[J].Journal of Ocean University of China,Natural Science,2010(S1):197-200.(in Chinese))
[16]杨辉,王婷,雷铮强,等.管土接触作用下埋地管道力学分析[J].石油矿场机械,2015(7):44-47.(YANG Hui,WANG Ting,LEI Zhengqiang,et al.Analysis on mechanical characteristics of buried pipeline under pipe-soil contact[J].Oil Field Equipment,2015(7):44-47.(in Chinese))
[2]何宁,徐崇崴,段梦兰,等.J型铺管法研究进展[J].石油矿场机械,2011,40(3):63-67.(HE Ning,XU Chongwei,DUAN Menglan,et al.Overview of J-lay technology for subsea pipelines[J].Oil Field Equipment,2011,40(3):63-67.(in Chinese))
[3]陈景皓,段梦兰,徐崇崴,等.深水海底管道J形铺设参数[J].油气储运,2013,32(6):654-658.(CHEN Jinghao,DUAN Menglan,XU Chongwei,et al.Parameters of J-lay method for deepwater submarine pipeline[J].Oil&Gas Storage and Transportation,2013,32(6):654-658.(in Chinese))
[4]沙勇,周巍伟,李丽玮,等.深水海底管道J型铺设的动态分析[J].工程力学,2014,31(增刊):228-230,238.(SHA Yong,ZHOU Weiwei,LI Liwei,et al.The dynamic analysis of a depwater pipeline installed by J-lay method[J].Engineering Mechanics,2014,31(S):228-230,238.(in Chinese))
[5]王知谦,杨和振.深海J型铺管法管线触地区域动力响应研究[J].海洋技术学报,2014,33(5):101-106.(WANG Zhiqian,YANG Hezhen.Study on touch down zone dynamics of pipelines during deep sea J-lay installation[J].Journal of Ocean Technology,2014,33(5):101-106.(in Chinese))
[6]叶茂,段梦兰,徐崇崴,等.J形铺设过程管道动态分析与研究[J].石油机械,2013(6):43-48.(YE Mao,DUAN Menglan,XU Chongwei,et al.Dynamic analysis and study of J-shaped pipeline-laying process[J].China Petroleum Machinery,2013(6):43-48.(in Chinese))
[7]LENCI S,CALLEGARI M.Simple analytical models for the J-lay problem[J].Acta Mechanica,2005,178(1-2):23-39.
[8]WANG L Z,YUAN F,GUO Z,et al.Numerical analysis of pipeline in J-lay problem[J].Journal of Zhejiang University,Science A,2010,11(11):908-920.
[9]WANG L Z,YUAN F,GUO Z,et al.Analytical prediction of pipeline behaviors in J-lay on plastic seabed[J].Journal of Waterway,Port,Coastal,and Ocean Engineering,2011,138(2):77-85.
[10]BAI Y,YU B,CHENG P.Offshore installation of reinforced thermoplastic pipe(RTP)[C]//Proceedings of the Twenty-second International Offshore and Polar Engineering Conference.International Society of Offshore and Polar Engineers,2012.
[11]白勇,唐继蔚,余彬彬,等.柔性管Reel-lay铺管安装稳定性分析[J].海洋工程,2013,31(6):22-29.(BAI Yong,TANG Jiwei,YU Binbin,et al.Installation stability for flexible pipeline by Reel-lay method[J].The Ocean Engineering,2013,31(6):22-29.(in Chinese))
[12]RUAN Weidong,BAI Yong,CHENG Peng.Static analysis of deepwater lazy-wave umbilical on elastic seabed[J].Ocean Engineering,2014,91:73-83.
[13]付长静,李国英,赵天龙.海底管道与海床相互作用研究综述[J].水利水运工程学报,2014(6):100-106.(FU Changjing,LI Guoying,ZHAO Tianlong.On interaction between submarine pipelines and seabed under action of waves[J].Hydro-Science and Engineering,2014(6):100-106.(in Chinese))
[14]梁勇,金志江,叶皓,等.深海钢悬链立管管土相互作用研究进展[J].船舶工程,2013(6):1-5.(LIANG Yong,JIN Zhijiang,YE Hao,et al.Review of research on interactions of deepwater steel catenary risers with seabed[J].Ship Engineering,2013(6):1-5.(in Chinese))
[15]王小东,郭海燕,高秦岭,等.钢悬链线立管触地点区域管土相互作用的有限元分析[J].中国海洋大学学报:自然科学版,2010(S1):197-200.(WANG Xiaodong,GUO Haiyan,GAO Qinling,et al.Finite element analysis of steel catenary riser/seafloor interaction in the touch down zone[J].Journal of Ocean University of China,Natural Science,2010(S1):197-200.(in Chinese))
[16]杨辉,王婷,雷铮强,等.管土接触作用下埋地管道力学分析[J].石油矿场机械,2015(7):44-47.(YANG Hui,WANG Ting,LEI Zhengqiang,et al.Analysis on mechanical characteristics of buried pipeline under pipe-soil contact[J].Oil Field Equipment,2015(7):44-47.(in Chinese))