Spar平台多自由度耦合的涡激运动数值模拟研究  

Numerical simulation study of vortex-induced motion with coupled multi-degrees of freedom on Spar platform

作　　者：周阳 李忠明 张艺林 王锋 ZHOU Yang;LI Zhong-ming;ZHANG Yi-lin;WANG Feng(School of Marine Engineering Equipment,Zhejiang Ocean University,Zhoushan 316022,China;School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学海洋工程装备学院,浙江舟山316022 [2]浙江海洋大学船舶与海运学院,浙江舟山316022

出　　处：《船舶力学》2024年第7期1040-1050,共11页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(42006175);舟山市科技计划项目(2021C21025)。

摘　　要：为研究Spar平台在均匀流作用下多自由度耦合的涡激运动特性,本文基于STAR-CCM+求解器建立了考虑流固耦合的Spar平台涡激运动数值模型,探讨了纵荡、横荡、垂荡、纵摇和横摇五个自由度的耦合效应。结果表明:Spar平台在横荡、垂荡与横摇三个自由度发生明显“涡激共振”现象,并且垂荡与横摇自由度“涡激共振”现象发生的速度区间基本一致;横荡与横摇自由度保持着较高的耦合性,横荡共振时横荡与横摇的运动主频保持1:1的关系,横摇共振时横荡运动频谱的次峰频率等于横摇运动主频;纵荡、垂荡与纵摇三个自由度存在复杂的非线性耦合运动关系,不仅纵荡、垂荡的运动主频始终存在于纵摇频谱中,而且纵摇与纵荡、纵摇与垂荡的耦合程度在不同的折合速度范围内存在差异。In order to study the vortex-induced motion characteristics with coupled multi-degrees of freedom of Spar platforms under a uniform flow,a numerical model about the vortex-induced motion of a Spar plat⁃form considering fluid-structure interactions was established based on STAR-CCM+,and the coupling ef⁃fects of five-degrees of freedom(surge,sway,heave,pitch and roll)were investigated.The results show that the vortex-induced resonance can be observed obviously at three degrees of freedom(sway,heave and roll),and the velocity interval of vortex-induced resonance is the same at the two degrees of freedom(heave and roll).Meanwhile,the coupling effects between sway and roll are obvious.In the case of sway resonance,the relationship of the dominant frequency between sway and roll is 1:1,and in the case of roll resonance,the sec⁃ondary peak frequency of sway is the same as the dominant frequency of roll.Moreover,there are complex nonlinear coupling relationships among the three degrees of freedom(surge,heave and pitch),not only the dominant frequency of surge and heave always exists in the pitch spectrum,but also the coupling effects be⁃tween pitch and surge,pitch and heave are various in the different ranges of reduced velocity.

关 键 词：SPAR平台 涡激运动 流固耦合 多自由度 STAR-CCM+ 

分 类 号：U661.1[交通运输工程—船舶及航道工程]