Influences of Floater Motion on Gap Resonance Triggered by Focused Wave Groups

作     者：GAO Jun-liang LYU Jing ZHANG Jian ZANG Jun GAO Jun-liang;LYU Jing;ZHANG Jian;ZANG Jun

作者机构：School of Naval Architecture and Ocean EngineeringJiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of PortWaterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water ResourcesGuangzhou 510611China Centre for InfrastructureGeotechnical and Water Engineering(IGWE)Department of Architecture and Civil EngineeringUniversity of BathBA27AYUK 

出 版 物：《中国海洋工程:英文版》 (China Ocean Engineering)

年 卷 期：2023年第37卷第4期

页      面：685-697页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0802[工学-机械工程] 0814[工学-土木工程] 

基　　金：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.WSGBA-KJ202309) the Qing Lan Project of Jiangsu Universities The authors also thank the Royal Society(Grant No.IEC\NSFC\181321)for providing partial support for this work。 

主　　题：gap resonance focused waves wave amplification wave forces OpenFOAM 

摘      要：The current study investigates the hydrodynamic characteristics of gap resonance within a narrow gap formed by two adjacent boxes subjected to incident focused transient wave groups.A two-dimensional(2D)numerical wave tank based on the OpenFOAM package is utilized for this purpose.The weather-side box is fixed while the lee-side box is allowed to heave freely under wave actions.The effects of the focused wave amplitude and spectral peak period on the wave amplification within the gap,motion of the lee-side box,and wave forces(including horizontal and vertical wave forces)acting on each box are systematically examined.For comparison,another structural layout consisting of two fixed boxes is also considered.The results reveal that the release of the heave degree of freedom(DoF)of the lee-side box results in remarkably distinct resonance features.In the heave-box system,both its fluid resonant period and the period corresponding to the maximum heave displacement of the lee-side box are significantly larger(i.e.,1.6-1.7 times)than the fluid resonant period of the fixed-box system.However,the wave amplification factor inside the gap in the heave-box system is significantly lower than that in the fixed-box one.Both the variations of the maximum horizontal and vertical wave forces with the spectral peak period and their magnitudes are also significantly different between the two structural systems.