剪切流中Cell-Truss Spar平台涡激运动的CFD计算与模型试验研究  

CFD and Experimental Study on Vortex-Induced Motions of a Cell-Truss Spar platform in shear currents

作　　者：王颖[1] 杨建民[1] 李润培[1] 李欣[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200030

出　　处：《中国造船》2008年第A02期251-259,共9页Shipbuilding of China

基　　金：国家863重大项目课题（2006AA09A107）：上海市优秀学科带头人计划（07XD14018）

摘　　要：目前，Spar平台在离岸深水作业中得到越来越广泛的应用，作为影响Spar平台在某些来流条件下运动响应特性的一种重要现象，涡激运动已成为国际海洋工程界亟待研究的一个新课题。本文采用CFD计算与模型试验相结合的方法，对一座称为“Cell-Truss Spar”的新型Spar平台在剪切流作用下发生涡激运动的现象进行了研究。相对于目前已存在并应用的Spar平台，Cell-Truss Spar平台在结构形式上有其自身的特征，研究中充分考虑了这一特征，对其建立适当的CFD计算模型，得到其涡激运动的特征，模拟了锁定现象的发生过程，分析了锁定现象的发生机理和规律；同时制作了精细的物理模型，测试了一系列的剪切流表面流速，得到了Cell-Truss Spar平台涡激运动的一些关键性参数，并成功地观察到了锁定现象的发生。CFD计算与模型试验相互比较，相互验证，最后对该平台涡激运动响应的特征进行了分析和总结，为进一步的涡激运动抑制研究奠定了基础。Spar platforms have become more and more popular for offshore deepwater operations. Vortex-induced-motion of the Spar platform, as an important phenomenon which affects the motion performances of a Spar in certain current conditions, has become a new subject in the ocean engineering field. In this paper, the vortex-induced motions of Cell-Truss Spar in shear current under different reduced velocities, which has been put forward by State Key Laboratory of Ocean Engineering of Shanghai Jiaotong University recently, are studied using both CFD and model test method. The Cell-Truss Spar is a new design concept that has several physical characteristics which are different from those of the present Classic Truss Spar and Cell Spar. In this study, the unique character of the Cell-Truss Spar is carefully considered in CFD simulations and the model tests. Many important parameters in vortex-induced motions of the Cell-Truss Spar are obtained, the occurrence of lock-in phenomenon is successfully simulated and observed, and the characters of vortex-induced-motion responses of the Cell-Truss Spar are analyzed and summarized. This study sets up a basis for the successive researches on the suppression of vortex-induced motions of the Cell-Truss Spar in the future.

关 键 词：Cell-Truss Spar 涡激运动 CFD 模型试验 折合速度 

分 类 号：TV672.3[水利工程—水利水电工程] S968.25[农业科学—水产养殖]