基于CFX的配置浮筒海洋立管涡激振动研究  

Research of Vortex-induced Vibration of Marine Risers with Buoyancy Modules Based on CFX

作　　者：钟诗民[1] 黄维平[1] 段金龙[2] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《船海工程》2015年第2期157-160,共4页Ship & Ocean Engineering

基　　金：国家自然科学基金(51179179;51239008)

摘　　要：运用CFX软件对4种不同浮筒覆盖率下的深水立管涡激振动进行模拟,验证大涡模拟在配置浮筒立管研究中的可行性。结果表明,浮筒覆盖率越大,立管均方根响应幅值越大;在不同的浮筒覆盖率的情况下,海洋立管的主要振动响应频率与浮筒所支配的涡泻频率和立管所支配的涡泻频率有关,浮筒覆盖率较小进行高频运动,浮筒覆盖率较大进行低频运动;数值模拟的均方根位移与模型试验的的均方根位移相符合,数值模拟的振动响应频率范围与模型试验的频率响应范围一致,对配置浮筒的海洋深水立管运用大涡模拟是可行的。The vortex-induced vibration （ VIV） of risers with four coverage of buoyancy modules is simulated by using CFX software.The numerical results show that the larger the coverage ration of buoyancy modules is, the bigger the value of RMS dis-placement is.The dominated response frequency of risers is related to the coverage of buoyancy modules.Due to the different di-ameters, the lift and drag forces of different sections seem competitive, which may lead risers show higher main frequencies.So dominated response frequency of risers is inversely proportional to the coverage of risers.The results from numerical simulations are a nice match for the model experiments result.

关 键 词：深水立管 均方根位移 涡激振动 浮筒覆盖率 

分 类 号：U674.38[交通运输工程—船舶及航道工程]