丁伟伟1，邹早建1,2，吴静萍3

1. 上海交通大学 船舶海洋与建筑工程学院， 上海 200240; 2. 上海交通大学 海洋工程国家重点实验室， 上海 200240; 3. 武汉理工大学 交通学院，武汉 430063

发布日期:2019-10-11
通讯作者:邹早建，男，教授，博士生导师，E-mail: zjzou@sjtu.edu.cn.
作者简介:丁伟伟(1990-)，男，安徽省安庆市人，博士生，研究方向为波浪与结构物的相互作用.

Bragg Reflection of Water Waves by Multiple Semicircular Structures Fixed on the Water Surface

DING Weiwei 1,ZOU Zaojian 1,2,WU Jingping 3

1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 3. School of Transportation, Wuhan University of Technology, Wuhan 430063, China

Published:2019-10-11

摘要/Abstract

摘要： 基于线性波浪理论，应用边界元法(BEM)研究固定于静水面的多个半圆形结构物的水波Bragg反射现象.计算固定于海底的多个半圆形结构物的反射系数，并将计算结果与文献中的理论解进行比较，以验证BEM的正确性.计算并对比水面单个半圆形结构和多个半圆形结构的反射系数，以证明基于Bragg反射原理的多个结构物衰减波浪的有效性.进而分析多个半圆形结构物的个数、半径、间距等参数对Bragg反射特性的影响，研究结果可为基于Bragg反射原理的防波堤设计提供参考依据.
关键词: 多个半圆形结构物； 水波； Bragg反射； 边界元法
Abstract: Bragg reflection of water waves by multiple semicircular structures fixed on the water surface is investigated by using the boundary element method (BEM). It is based on the linear wave theory. In order to verify the correctness of BEM, the reflection coefficient of multiple semicircular structures fixed on the seabed is calculated. And the numerical results are compared with the theoretical results in literature. The effectiveness of the multiple semicircular structures fixed on the water surface in attenuating waves based on the principle of Bragg reflection is also proved. The effects of the number, the radius and the spacing of semicircular structures on the characteristics of Bragg reflection are investigated. The results of this study can provide a certain reference for the design of breakwater based on the principle of Bragg reflection.
Key words: Bragg reflection of water waves by multiple semicircular structures fixed on the water surface is investigated by using the boundary element method (BEM). It is based on the linear wave theory. In order to verify the correctness of BEM, the reflection coefficient of multiple semicircular structures fixed on the seabed is calculated. And the numerical results are compared with the theoretical results in literature. The effectiveness of the multiple semicircular structures fixed on the water surface in attenuating waves based on the principle of Bragg reflection is also proved. The effects of the number, the radius and the spacing of semicircular structures on the characteristics of Bragg reflection are investigated. The results of this study can provide a certain reference for the design of breakwater based on the principle of Bragg reflection.


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