Numerical Investigations on Harbor Oscillations Induced by Falling Objects  

作　　者：GAO Jun-liang BI Wen-jing ZHANG Jian ZANG Jun 

机构地区：[1]School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China [2]Key Laboratory of Port,Waterway and Sedimentation Engineering of MOT,Nanjing Hydraulic Research Institute,Nanjing 210029,China [3]Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources,Guangzhou 510611,China [4]Centre for Infrastructure,Geotechnical and Water Engineering(IGWE),Department of Architecture and Civil Engineering,University of Bath,BA27AY,UK

出　　处：《China Ocean Engineering》2023年第3期458-470,共13页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant No.51911530205);the Natural Science Foundation of Jiangsu Province (Grant No.BK20201455);the Guangdong Basic and Applied Basic Research Foundation (Grant No.2023A1515010890);the Key Laboratory of Port;Waterway and Sedimentation Engineering of MOT (Grant No.YK222001-2);the Open Research Fund of Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources (Grant No.WSGBAKJ202309);the Qing Lan Project of Jiangsu Universities;the Royal Society (Grant No.IECNSFC181321)。

摘　　要：In this paper,the open-sourced computational fluid dynamics software,OpenFOAM~?,is used to study the fluctuation phenomenon of the water body inside a horizontally one-dimensional enclosed harbor basin with constant water depth triggered by falling wedges with various horizontal falling positions,initial falling velocities and masses.Based on both Fourier transfo rm analysis and wavelet spectrum analysis for the time series of the free surface elevations inside the harbor basin,it is found for the first time that the wedge falling inside the harbor can directly trigger harbor resonance.The influences of the three factors(including the horizontal falling position,the initial falling velocity,and the mass)on the response amplitudes of the lowest three resonant modes are also investigated.The results show that when the wedge falls on one of the nodal points of a resonant mode,the mode would be remarkably suppressed.Conversely,when the wedge falls on one of the anti-nodal points of a resonant mode,the mode would be evidently triggered.The initial falling velocity of the wedge mainly has a remarkable effect on the response amplitude of the most significant mode,and the latter shows a gradual increase trend with the increase of the former.While for the other two less significant modes,their response amplitudes fluctuate around certain constant values as the initial falling velocity rises.In general,the response amplitudes of all the lowest three modes are shown to gradually increase with the mass of the wedge.

关 键 词：harbor oscillations SEICHES falling objects resonant mode response amplitude 

分 类 号：U652[交通运输工程—港口、海岸及近海工程]