摘要
研究海床土吸力对深海钢悬链线立管(SCR)与Spar平台整体波浪响应的影响。分别采用大挠度曲线梁模型、弹性地基梁模型模拟SCR的悬垂段和流线段,考虑SCR与Spar的动力耦合效应,提出整体分析法,并基于锚链/SCR分析程序Ca-ble3D开发V-Cable3D。考虑海床土吸力影响,时域动力响应分析获得一海况下SCR顶点和触地点的位移、张力、弯矩和应力时程。比较分析表明:SCR顶点和触地点附近分别存在波浪响应过程中的张力最大值和弯矩最大值,吸力对这两个特征量以及立管应力状态影响较大。提出的整体分析法为SCR波浪响应分析方法提供了新思路,对SCR与海床的相互作用分析有一定的参考意义。
This paper presents the effect of soil suction on the wave response of a deepwater steel catenary riser（SCR） and Spar system.Using modeled sag bend of the SCR as a slender beam with large curvature,and simulated flowline as the elastic foundation beam,the method of the integrated analysis is proposed considering dynamic coupling effect of SCR and Spar.V-Cable3d is developed based on the cable/SCR analysis program Cable3d.By the dynamic response analysis in time domain, the time histories of displacements,tensions,bending moments and stresses on the top and touchdown point of the SCR are obtained considering soil suction.According to the comparative analysis,it shows that the maximum values of the tension and bending moment occur on the top and the touchdown point,respectively.The soil suction affects the above-mentioned features and the stresses of the SCR evidently.In conclusion,the proposed integrated analysis approach provides a new strategy for wave response analysis of SCR.The research results are helpful to analyzing the riser/soil interaction.
出处
《海洋工程》
CSCD
北大核心
2010年第2期58-64,共7页
The Ocean Engineering
基金
国家自然科学基金重点资助项目(50639030)
