卷破波冲击下透空式面板受力特性数值模拟

Numerical simulation of hydrodynamic characteristics of the permeable plate under plunging wave impact

卷破波是近海环境中常见的破碎波浪,对近海结构物具有较大的破坏性。基于CFD软件FLOW-3D建立二维波浪水槽,对比5种形态的卷破波冲击下透空式面板的受力特性和波浪爬高情况,并讨论了面板相对净空高度、相对水深和迎浪面倾角的影响。研究表明:5个形态的卷破波中,P2形态卷破波的水平波浪力最大,P3形态卷破波的爬高最显著,P1至P3形态卷破波的竖向波浪力趋于相等;面板相对净空高度、相对水深和迎浪面倾角对卷破波冲击作用力和爬高有较大影响,相对净空高度的增大能有效削减卷破波冲击力和爬高,而相对水深的增加将导致透空式面板受到的卷破波水平、竖向波浪力和波浪爬高增大;随着迎浪面倾角从0°增大到60°,波浪爬高逐渐减小,卷破波作用力先增大后减小,P1形态卷破波的水平、竖向波浪力的变化幅度最大,P4形态卷破波的竖向波浪力减小幅度最大,P3形态卷破波的爬高减小最显著。

Plunging wave is a common breaking wave in the coastal environment,which has a great destructive effect on coastal structures.A two-dimensional wave flume was built based on CFD software Flow-3D.The force characteristics and wave run-up of a permeable plate under the impact of the plunging waves in five forms were compared,and the effects of relative plate clearance,relative water depth,and inclination on the front and bottom faces were discussed.The results show that the horizontal wave force of the plunging wave in P2 is the largest,the run-up of the plunging wave in P3 is the most significant,and the vertical wave force of the plunging wave in forms P1 to P3 tend to be equal.The impact force and wave run-up are significantly influenced by relative plate clearance,relative water depth,and inclination of the front face of the plunging wave.The impact force and wave run-up of plunging wave reduce with the increasing relative clearance,while increase with the increasing relative water depth.With the increase of the inclination angle from 0 to 60 degrees,the wave run-up decreases gradually,the force of the plunging wave increases first and then decreases,the horizontal and vertical wave forces of the plunging wave in P1 change the most,and the vertical wave forces of plunging wave in P4 decrease the most,the plunging wave run-up in P3 decreases the most significantly.