孤立波与升沉水平板相互作用数值模拟研究  

Numerical investigation of interaction between solitary waves and a submerged heave plate

作　　者：纪巧玲 刘庆凯 徐成浩 JI Qiaoling;LIU Qingkai;XU Chenghao(College of Transportation,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学交通学院,山东青岛266590

出　　处：《海洋工程》2021年第4期70-78,共9页The Ocean Engineering

基　　金：山东省自然科学基金项目(ZR2020ME259,ZR2016EEB06,ZR2018PEE029);山东省高等学校科技计划项目(J18KA198);中国科学院海洋环流与波动重点实验室开放研究基金(KLOCW2006)。

摘　　要：合理的刚度和潜深设计可以使升沉水平板获得优异的消浪性能。基于考虑流体黏性的二维不可压缩Navier-Stokes方程,以高阶紧致插值CIP(constrained interpolation profile)方法求解方程对流项,采用VOF(volume of fluid)方法重构自由液面,构建二维数值波浪水槽。采用试验数据验证模型后,研究孤立波与升沉水平板相互作用,分析相对刚度K*、相对潜深d/h、相对波高H/h对于升沉板的消浪性能和运动响应的影响,揭示升沉板对孤立波的消浪机理。研究表明:在孤立波通过时,升沉板会经历一个先上升后下降的运动,随后非线性自由振动,板下方水体近似均匀流动,且水流的垂向流动与板的垂荡方向一致;升沉板主要通过不对称涡旋脱落、浅水变形、波浪反射与辐射波转化等方式消耗孤立波能量;一定条件下,采用最优相对刚度K*=4.0和最优相对潜深d/h=0.52可以取得良好的消浪效果,此时透射系数最小,同时升沉板的运动响应在合理的范围内。The reasonable design of stiffness and diving depth can make the heave plate obtain excellent wave dissipation performance.A two-dimensional numerical wave tank is established based on the two-dimensional incompressible viscous Navier-Stokes equations,in which the high-order constrained interpolation profile(CIP)method is used to solve the advection term of the equations,and the free surface is reconstructed by VOF-type method.After the model is verified by test data,the interaction between solitary wavse and a submerged heave plate is studied.The influence of relative stiffness K*,relative depth d/h and relative wave height H/h on wave dissipation performance and motion response of the heave plate is analyzed,and the wave dissipation mechanism of the heave plate subjected to solitary waves is revealed.The study shows that:when a solitary wave passes by,the heave plate will experience a motion of first rising and then descending,and then a nonlinear free heaving motion.The water under the plate flows approximately uniformly,and its vertical flow is consistent with the heave motion of the plate.The heave plate dissipates the solitary wave energy mainly through asymmetric vortex shedding,shallow water deformation,wave reflection and conversion into radiation wave.Optimized parameters of K*=4.0 and d/h=0.52 are selected to achieve a good wave dissipation effect,in which the transmission coefficient is minimized and the motion response of the heave plate is controlled within a reasonable range.

关 键 词：升沉水平板 孤立波 消浪性能 透射系数 相对刚度 相对潜深 

分 类 号：TV139.2[水利工程—水力学及河流动力学]