分隔板对Spar平台涡激运动响应影响的分析研究  

Numerical simulation of vertex induced motion for Spar platform with frontal splitter plate

作　　者：郭涵慧 赵伟文 万德成[1] GUO Hanhui;ZHAO Weiwen;WAN Decheng(Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船海计算水动力学研究中心(CMHL)船舶海洋与建筑工程学院,上海200240

出　　处：《海洋工程》2022年第6期11-20,共10页The Ocean Engineering

基　　金：国家自然科学基金资助项目(52131102,51909160,51879159);国家重点研发计划项目(2019YFB1704200)。

摘　　要：当流体流经单柱式结构物时,由于流体黏性和逆压梯度的存在,会产生非定常的升力、阻力和涡旋脱落,即涡激运动现象,对一座Truss Spar平台的硬舱部分附加长度为1.0 D(D为硬舱直径)的刚性来流侧分隔板,基于开源平台OpenFOAM,采用基于剪切应力运输的延迟分离涡模拟(SST-DDES)方法,在不可压缩黏性流场中,对其进行三维数值模拟,以研究在不同流速下,来流侧分隔板对Spar平台涡激运动特性和运动响应的影响。结果表明:在较高流速下,横荡周期减小22.21%,横荡最大幅值减小81.3%。说明在较高流速下,附加分隔板有助于减少Spar平台的运动响应幅值。When fluid flows through a single column structure,unsteady lift forces,drag and vortex shedding will occur due to the existence of fluid viscosity and adverse pressure gradient.In this paper,based on the open source platform of OpenFOAM,the delayed detached eddy simulation(DDES)based on shear stress transport,namely SST-DDES,is adopted to carry out three-dimensional numerical simulation on a Truss Spar platform.A rigid partition plate with a length of 1.0 D(D is the diameter of the hard cabin)is attached to the hard cabin of the platform,so as to study the influence of the frontal splitter plate on the vortex-induced motion characteristics at different flowing velocities.The results show the period of sway is reduced by 22.21%and the maximum amplitude of sway is reduced by 81.3%at higher velocity.Therefore,the additional partition plate is helpful to reduce the amplitude of sway motion response of Spar platform at higher velocity.

关 键 词：SPAR平台 延迟分离涡模拟 涡激运动 分隔板 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]