不同刚度圆柱振子涡激振动数值模拟  

Numerical Simulation of Vortex-Induced Vibration of Cylindrical Oscillator with Different Stiffness

作　　者：宋玉泉 谭俊哲[1,2,3] 袁鹏[1,2,3] 司先才[1,2,3] 杜修茂 李昌明 Song Yuquan;Tan Junzhe;Yuan Peng;Si Xiancai;Du Xiumao;Li Changming(College of Engineering,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Ocean Engineering,Ocean University of China,Qingdao 266100,China;Qingdao Municipal Key Laboratory of Ocean Renewable Energy,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]中国海洋大学山东省海洋工程重点实验室,山东青岛266100 [3]中国海洋大学青岛市海洋可再生能源重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2024年第9期133-140,共8页Periodical of Ocean University of China

基　　金：国家重点研究发展计划项目(2018YFB1501903);山东省重点研究发展计划项目(2019GGX103012)资助。

摘　　要：为了研究不同刚度涡激振动系统对圆柱振子振动特性的影响,本文建立了单自由度涡激振动系统的仿真模型,采用计算流体力学(CFD)方法并结合重叠网格技术进行数值模拟。通过与公开发表的文献数据进行对比,验证了模型的精度和方法的可靠性。本文对时变流速下圆柱振子的振幅响应、频率响应和尾涡特征的变化情况进行了详细分析。仿真结果表明:当圆柱振子的振幅随流速的改变而降低时,调整弹簧刚度的大小,可使其保持较大的无量纲振幅和振动频率,并使尾流脱落旋涡之间的间距增大,且脱落模式由“2S”模式变为“2P”模式。In order to study the influence of the vortex-induced vibration system with different stiffness on the vibration characteristics of cylindrical oscillators,a simulation model of vortex-induced vibration system of the single-degree of freedom was established,and the numerical simulation was carried out by using computational fluid dynamics(CFD)method and overlapping mesh technology.The accuracy of the model and the reliability of the method are verified by comparison with published data.In this paper,the amplitude response,frequency response and wake vortex characteristics of cylindrical oscillator under time-varying velocity are analyzed.The simulation results show that when the amplitude of cylindrical oscillator decreases with the change of flow velocity,adjusting the spring stiffness can maintain the large dimensionless amplitude and oscillator frequency,the spacing between wake shedding vortices increases,and the shedding mode changes from"2S"mode to"2P"mode.

关 键 词：涡激振动 弹簧刚度 计算流体力学 重叠网格 圆柱振子 

分 类 号：TK73[交通运输工程—轮机工程]