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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。
Abstract：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.
[1] Liu X,Chen Z,Si Y,et al.A review of tidal current energy resource assessment in China[J].Renewable and Sustainable Energy Reviews,2021,145:111012.
[2] 袁鹏，刘林，司先才，等.波流耦合环境下潮流能水轮机阵列对区域潮流特性影响研究[J].太阳能学报，2021,42(9):439-445.Yuan Peng,Liu Lin,Si Xiancai,et al.Study on influence of tidal turbine array on regional tidal stream characteristics under wave-current coupling[J].Acta Energiae Solaris Sinica,2021,42(9):439-445.
[3] Khalak A,Williamson C.Dynamics of a hydroelastic cylinder with very low mass and damping[J].Journal of Fluids and Structures,1996,10(5):455-472.
[4] Khalak A,Williamson C.Fluid forces and dynamics of a hydroelastic structure with very low mass and damping[J].Journal of Fluids and Structures,1997,11(8):973-982.
[5] Stappenbelt B,Lalji F,Tan G.Low mass ratio vortex-induced motion[C]//Asian Fluid Mechanics Committee.Crown Plaza:16th Australasian fluid mechanics conference,2007,12:1491-1497.
[6] Bernitsas M M,Raghavan K,Ben-Simon Y,et al.VIVACE (Vortex Induced Vibration Aquatic Clean Energy):A new concept in generation of clean and renewable energy from fluid flow[J].Journal of Offshore Mechanics and Arctic Engineering,2008,130(4):041101.
[7] Lee J H,Xiros N,Bernitsas M M.Virtual damper—spring system for VIV experiments and hydrokinetic energy conversion[J].Ocean Engineering,2011,38(5-6):732-747.
[8] Sun H,Kim E S,Nowakowski G,et al.Effect of mass ratio,damping,and stiffness on optimal hydrokinetic energy conversion of a single,rough cylinder in flow induce motion[J].Renewable Energy,2016(99):936-959.
[9] 徐枫，欧进萍，肖仪清.不同截面形状柱体流致振动的CFD数值模拟[J].工程力学，2009,26(4):7-15.Xu Feng,Ou Jinping,Xiao Yiqing.CFD numerical simulation of flow-induced vibration with different cross-section cylinder[J].Engineering Mechanics,2009,26(4):7-15.
[10] 白旭，乐智斌.不同质量比对刚性圆柱体涡激振动振幅的影响[J].船舶工程，2016,38(8):34-39.Bai Xu,Le Zhibin.Effect of response of cylinder VIV with different mass ratio[J].Ship Engineering,2016,38(8):34-39.
[11] 蔡云雯，王树杰，袁鹏，等.潮流能转换装置串列双圆柱下游圆柱流致振动数值模拟[J].中国海洋大学学报(自然科学版),2018,48(S1):172-178.Cai Yunwen,Wang Shujie,Yuan Peng,et al.Numerical simulation of flow-induced vibration of the downsteam cylinder in tandem arrangement of tidal energy converter[J].Periodical of Ocean University of China,2018,48(S1):172-178.
[12] 陈东阳，肖清，顾超杰，等.柱体结构涡激振动数值计算[J].振动与冲击，2020,39(19):7-12.Chen Dongyang,Xiao Qing,Gu Chaojie,et al.Numerical calculation of vortex-induced vibration of a cylinder structure[J].Journal of Vibration and Shock,2020,39(19):7-12.
[13] Modir A,Goudarzi N.Experimental investigation of Reynolds number and spring stiffness effects on vortex induced vibrations of a rigid circular cylinder[J].European Journal of Mechanics-B/Fluids,2019,74:34-40.
基本信息:
DOI：10.16441/j.cnki.hdxb.20220325
中图分类号:O35;P743
引用信息:
[1]宋玉泉,谭俊哲,袁鹏,等.不同刚度圆柱振子涡激振动数值模拟[J].中国海洋大学学报(自然科学版),2024,54(09):133-140.DOI:10.16441/j.cnki.hdxb.20220325.
基金信息:
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~~
2024-08-26
2024-08-26