深水钢悬链线立管非线性有限元静力分析  

STATIC ANALYSIS OF DEEPWATER STEEL CATENARY RISER USING NONLINEAR FINITE ELEMENT METHOD

作　　者：白兴兰[1] 黄维平[2] 

机构地区：[1]浙江海洋学院船舶与建筑工程学院,浙江舟山316004 [2]中国海洋大学海洋工程系,山东青岛266100

出　　处：《工程力学》2011年第4期208-213,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50739004;51079136);浙江省自然科学基金项目(Y5110071;Y100671)

摘　　要：基于大挠度柔性索理论,采用可曲线梁模型模拟钢悬链线立管,考虑触地点挠度的影响,对CABLE3D程序进行了二次开发。同时考虑浮式结构运动和钢悬链线立管与海底相互作用问题,分析了Spar平台静态偏移引起的钢悬链线立管静态位形、顶张力、触地点弯矩以及挠度影响下节点有效张力的变化趋势。分析表明:浮体运动将引起立管顶张力和触地点弯矩的峰值,而且触地点挠度对轴力的影响也不容忽视。研究可为钢悬链线立管的设计分析提供一定的参考。The steel catenary riser（SCR） has been simulated with an extensible flexibility cable model based on the assumption of a large deformation in bending and small extension.The program considering large curve at Touch Down Point（TDP） of SCR CABLE3D is improved secondly.Taking the factors of Spar motion and soil interaction into account,this paper focuses on the variation tendency of a few characteristic values affected by the SCR from Spar static offset,including static configuration,top tension,bending moment of TDP and effective tension.The computational results indicate that peaks of top-tension and bending moment at TDP are caused by offset of Spar.The effect of large curve at TDP on axial force should not be ignored.The study can provide reference value for design analysis of SCR.

关 键 词：钢悬链线立管 深水立管 有限元 大挠度 静力分析 

分 类 号：TV314[水利工程—水工结构工程]