常爽,黄维平,杨超凡

• 1:中国海洋大学工程学院山东省海洋工程重点实验室
• 2:上海外高桥造船有限公司

摘要(Abstract)：

钢悬链线立管(SCR)在上部浮体运动和波流荷载激励下会与海床土相互作用,传统的线性海床模型假定荷载位移关系是线性的,没有考虑管土相互作用的非线性过程和海床土吸力的影响,本文基于大挠度柔性索理论的钢悬链式立管动力分析程序CABLE3D,将立管受到线性海床的弹性支撑力扩充为立管受到的海床垂向力,充分考虑管土非线性相互作用,并考虑海床土吸力对钢悬链式立管触地点区域的影响,开发出新的动力分析程序。程序采用非线性有限元方法对控制方程进行离散,时域内采用Newmark-β法,求解给定上部浮体运动条件下,SCR的动力响应,通过算例对线性刚度海床和非线性刚度海床进行对比,并分析了不同海床刚度对SCR触地点动力响应和疲劳损伤的影响。结果表明:非线性海床刚度模型比线性海床刚度模型更接近真实的管土作用过程;在非线性海床刚度模型下,海床土刚度越大,SCR触地点区域垂向位移响应越小,应力幅值越大,疲劳损伤越严重。

关键词(KeyWords)： 钢悬链式立管;非线性管土作用;海床刚度;动力响应;疲劳分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51179179,51239008)资助~~

作者(Author): 常爽,黄维平,杨超凡

DOI: 10.16441/j.cnki.hdxb.20150409

参考文献(References)：

• [1]黄维平,李华军.深水开发的新型立管系统—钢悬链式立管(SCR)[J].中国海洋大学学报(自然科学版),2006,36(5):775-780.HUANG Wei-Ping,LI Hua-Jun.A new type of deepwater riser in offshore oil&gas production:the steel catenary riser,scr[J].Periodical of Ocean University of China,2006,36(5):775-780.
• [2]2H Offshore Engineering Ltd-“STRIDE JIP-Effects of Riser/Seabed interaction On SCRs”[R].Londor:Report No.1500-RPT-008,Rev02,2002.
• [3]傅俊杰,杨和振.深海钢悬链立管触地点动力响应分析[J].海洋工程,2009,27(2):36-40.FU Jun-Jie,YANG He-Zhen.Dynamic response analysis of a deepwater steel catenary riser at the touchdown point[J].The Ocean Engineering,2009,27(2):36-40.
• [4]Bridge C,Laver K,Clukey Ed,et al.Steel Catenary Riser Touchdown Point Vertical Interaction Models[C].Houston:Offshore Technology Conference,2004,OTC16628:1-9.
• [5]Willis N,West P.Interaction between deepwater catenary risers and a soft seabed:large scale sea trials[C].Houston:Offshore Technology Conf.,TX.OTC 13113,2001.
• [6]Edwards R Y,Machado R Z,Hennessy W F,et al.Load Monitoring at the Touchdown Point of the First Steel Catenary Riser Installed in a Deepwater Moored SemisubmersiblePlatform[C].Proceedings-Offshore Technology Conference.Houston,USA,OTC,1999,2:295-303.
• [7]Bridge C,Howells H,Toy N,et al.Full-scale model tests of a steel catenary riser[J].Advances in Fluid Mechanics,2003,36:107-116.
• [8]Aubeny C,Biscontin G,Zhang J.Seafloor Interaction with Steel Catenary Risers[R].Final Project Report for Offshore Technology Research Center,College Station,TX,2006.
• [9]白兴兰.基于惯性耦合的深水钢悬链式立管非线性分析方法研究[D].青岛:中国海洋大学,2009.BAI Xing-Lan.Study on method for nonlinear analysis of deepwater SCR based on inertial coupling[D].Qingdao:Ocean University of China,2009.
• [10]黄维平,白兴兰.深水钢悬链式立管的大挠度柔性索模拟方法[J].工程力学,2009,26(11):228-231,246.HUANG Wei-Ping,BAi Xing-Lan.The simulation of steel catenary risers in deepwater with flexible cable model[J].Engineering Mechanics,2009,26(11):228-231,246.
• [11]孟庆飞,黄维平.钢悬链式立管与海底相互作用弹性基础梁模拟方法研究[J].海洋工程,2013,31(4):74-78.MENG Qing-Fei,HUANG Wei-Ping.Simulation of SCR and seabed with elastic foundation beam model[J].The Ocean Engineering,2013,31(4):74-78.
• [12]Aubeny C,Shi H,Murff J.Collapse load for cylinder embedded in trench in cohesive soil[J].International Journal of Geomechanics,2005,5(4),320-325.
• [13]Aubeny C and Shi H.Interpretation of impact penetration measurements in soft clays[J].Geotech.Geoenviron.Eng.,2006,132(6):770-777.
• [14]DNV-RP-C203.Fatigue Design of Offshore Steel Structures[S].DNV,2012.

文章评论(Comment)：