Numerical investigation on interaction between regular waves and a fully submerged horizontal cylinder  

作　　者：Cheng Zeng Yu-die Hu Yu-ran Yin Jie Zhou Ling-ling Wang 

机构地区：[1]College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing,210098,China [2]China Water Resources Bei Fang Investigation,Design and Research Co.Ltd,Tianjin,300222,China [3]College of Mechanics and Materials,Hohai University,Nanjing,211100,China

出　　处：《Journal of Hydrodynamics》2023年第6期1101-1118,共18页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2022YFC3202605);supported by the Water Conservancy Science and Technology Project in Jiangsu Province(Grant No.2022061);the 111 Project(Grant No.B17015).

摘　　要：This paper presents a 2-D numerical investigation on interaction between regular waves and a fully submerged horizontal cylinder.A mathematical model of numerical wave tank with two-way fluid-solid interactions were developed and validated.The wave-induced vibrations of a single-degree-of-freedom cylinder were simulated at eleven gap ratios(d/a=8,10,12,14,16,18,20,22,24,28 and 32).Numerical results indicate that significant nonlinear characteristics are introduced into the originally linear waves with the presence of cylinder.Based on the variation characteristics of cylinder vibration amplitude,the gap ratios can be divided into three ranges,i.e.,the uncertain range(8≤d/a≤14),quasi-linear range(14≤d/a≤20)and linear range(20≤d/a≤32).Under the same wave condition,the gap ratio does not affect the frequencies of vortex shedding and cylinder vibration.The presence of the cylinder complicates the flow field and suppress the vortex shedding around the cylinder.

关 键 词：Numerical simulation linear wave wave-induced vibration gap ratio flow pattern 

分 类 号：TV13[水利工程—水力学及河流动力学]