钢悬链式立管与海床相互作用模拟方法研究-OALib.pdf

第30 卷第2 期 Vol.30 No.2 工 程 力 学 2013 年 2 月 Feb. 2013 ENGINEERING MECHANICS 14 文章编号：1000-4750(2013)02-0014-05 钢悬链式立管与海床相互作用模拟方法研究 1 1 2 黄维平 ，孟庆飞 ，白兴兰 (1. 中国海洋大学山东省海洋工程重点实验室，山东，青岛 266100 ；2. 浙江海洋学院船舶与建筑工程学院，浙江，舟山 316004) 摘 要: 基于大挠度曲线梁模型和弹性地基梁理论，研究了钢悬链式立管与海底相互作用的模拟方法。采用大挠 度曲线梁模拟钢悬链式立管的悬垂段，采用弹性地基梁模拟海底流线段。钢悬链式立管与海底相互作用模型不仅 考虑了弹性支撑反力和摩擦力，还考虑了动态效应的阻尼力和液化土的吸力。分析表明，采用大挠度曲线梁和弹 性地基梁模型分析钢悬链式立管，其单元尺寸的影响较小，可采用较大的计算单元，从而缩短计算时间、减少内 存。基于该方法的开发程序与商用程序OrcaFlex 吻合较好，但对单元长度的敏感性远远小于OrcaFlex 。 关键词：钢悬链式立管；弹性地基梁；大挠度曲线梁；深水立管；海床土吸力 中图分类号：TE54 文献标志码：A doi: 10.6052/j.issn.1000-4750.2011.08.0495 THE SIMULATION OF THE INTERACTION BETWEEN SCR AND SEABED 1 1 2 HUANG Wei-ping , MENG Qing-fei , BAI Xing-lan (1. Shandong Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao, Shandong 266100, China; 2. School of Naval Architecture and Civil Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316004, China) Abstract: The simulating method of the interaction between a steel catenary riser (SCR) and seabed is studied based on an extensible curve beam with a large curvature and a beam on an elastic foundation. The sagbend section and the flowline section of steel catenary risers are modeled by an extensible curve beam with a large curvature and a beam on an elastic foundation respectively. Not only the support and the friction of seabed are taken into account, but also the suction and damping force of seabed are included in the model of the interact