毗邻双箱体间水体共振的非线性特性  

Nonlinear characteristics of wave resonance in the gap between twin barges

作　　者：宁德志[1,2] 邱诗惠 张崇伟 NING Dezhi;QIU Shihui;ZHANG Chongwei(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Offshore Renewable Energy Research Center,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学海洋可再生能源研究中心,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2019年第2期234-239,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51679036和51709038);水文水资源与水利工程科学国家重点实验室开放研究基金重点项目(2016490111);中央高校基本科研业务费专项资金项目(DUT16RC(3)113);中国博士后科学基金项目(2018M630289)

摘　　要：为了研究毗邻双箱体间水体共振状态下的非线性特性,依据势流理论采用高阶边界元方法建立了时域完全非线性数值波浪水槽模型,采用域内源造波方法产生入射波浪,在水槽两端设置阻尼层消除波浪反射,在窄缝内引入人工阻尼项来模拟共振条件下的粘性耗散。通过数值结果与实验数据的对比,确定了不同入射波高条件下窄缝内的阻尼参数,研究发现,随着入射波波高的增大,共振频率处表征粘性耗散的阻尼强度增大,双箱体迎浪侧波浪爬高的非线性特征增强,而窄缝内水体的共振频率所受影响有限,且无因次共振波高减小。Based on high-order boundary element method,a fully-nonlinear potential flow numerical wave flume is developed to study the nonlinear characteristics of wave resonance between two adjacent barges.Incidental waves are generated by an inner source method.Damping zones are used at two ends of the flume to dissipate outgoing waves.An artificial damping term is introduced to free surface boundary resonance conditions in the gap to approximate the energy dissipation.By comparing the numerical results with the experimental data,we determine the damping parameters in the narrow gap corresponding to different incident wave heights.Our findings show that,with the increase of incident wave heights,the damping strength that represents the viscous dissipation at resonance increases and the nonlinear characteristics of wave run-ups along the upstream side of the barge are enhanced,whereas the resonance frequency of the liquid in the gap is not evidently affected and the dimensionless wave height at resonance decreases.

关 键 词：高阶边界元 源造波 窄缝 共振 非线性波浪 人工粘性 双箱体 

分 类 号：U661.1[交通运输工程—船舶及航道工程]