孤立波与直立透空防波堤相互作用的解析研究  

Analytical study on solitary wave interaction with vertical porous breakwater

作　　者：才瀚涛 黄华[1] 詹杰民[1] 朱梦华[1] 叶伟峰 CAI Han-tao;HUANG Hua;ZHAN Jie-min;ZHU Meng-hua;YE Wei-feng(Department of Applied Mechanics and Engineering,College of Engineering,Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]中山大学工学院应用力学与工程系,广东广州510275

出　　处：《水运工程》2019年第5期13-20,共8页Port & Waterway Engineering

基　　金：广东省协同创新与平台环境建设专项项目(2014B090904066);广东省公益研究与能力建设专项项目(2015A020216008)

摘　　要：在一定条件下浅水波可能以孤立波形态与近岸防波堤发生相互作用。针对这一现象,应用特征函数展开法,推导了斜入射孤立波作用下有限厚度直立透空防波堤的反射与透射波浪场的解析积分解,并据此计算了作用于防波堤的孤立波波浪力以及孤立波反射与透射波面,相关结果具有一定的理论与实用价值。计算结果表明:孤立波入射角、海况条件、防波堤表面透空系数以及孤立波特征参数等因素变化对波浪作用均有一定影响。与相同浅水条件下的Airy微幅波理论结果相比,孤立波理论对波浪载荷与最大波面的预测值明显更大,反映了浅水波的非线性效应,同时说明在一定的浅水条件下采用孤立波模型将更为合理可靠。Under certain conditions,shallow water waves may interact with offshore breakwaters in the form of solitary wave.In view of this phenomenon,the analytical integral solution to the reflected and transmitted solitary wave field caused by finite thickness vertical porous breakwater under action of oblique solitary wave is derived by applying the eigenfunction expansion approach,and solitary wave forces on breakwater and solitary reflected or transmitted wave surfaces are accordingly calculated,which have certain theoretical as well as application value.The results show that the variations of incidence wave angle,sea condition,breakwater surface porous coefficient and solitary wave characteristic parameter may have some influence on wave effects.Compared with Airy small amplitude wave theory under the same shallow water condition,the predicted values of wave load and the maximum wave surface of the solitary wave theory are significantly larger,reflecting the nonlinear effect of the shallow water wave.At the same time,it shows that the solitary wave model will be more reasonable and reliable under certain shallow water conditions.

关 键 词：孤立波 直立透空防波堤 波浪反射与透射 波浪力 波浪自由表面 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]