Wave Attenuation Properties of Double Trapezoidal Submerged Breakwaters on Flat-Bed

作     者：曹永港 蒋昌波 白玉川 

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin University School of Hydraulic EngineeringChangsha University of Science&Technology Institute of Sediment on River and Coast EngineeringTianjin University 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2012年第18卷第6期

页      面：401-410页

核心收录：

学科分类：081505[工学-港口、海岸及近海工程] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：Supported by the General Program of National Natural Science Foundation of China(No.50979066 and No.50979008) Ph.D.Programs Foundation of Ministry of Education of China(No.20094316110002) Scientific Research Fund of Department of Education, Hunan Province(No.10A006) 

主　　题：linear wave cnoidal wave double trapezoidal submerged breakwaters reflection coefficient transmis- sion coefficient attenuation coefficient 

摘      要：This paper investigates the wave attenuation properties of the double trapezoidal submerged breakwaters on the flat-bed by conducting physical experiments subjected to linear and cnoidal incident *** method of Goda s two points is used to separate the heights of incident,reflected and transmitted waves based on the experimental *** possible factors affecting the wave attenuation properties of the double trapezoidal submerged breakwaters(i.e.,the relative submerged water depth,relative breakwater spacing,wave steepness and relative wave height) are investigated with respect to the reflection and transmission *** results show that there is a range,within which the breakwater spacing has little impact on the reflection coefficient,and the transmission coefficient tends to be a *** influence of the wave steepness is reduced while the breakwater spacing is too large or too *** the range of the relative wave height tested in this study,the reflection and transmission coefficients increase and decrease with the relative wave height,*** double trapezoidal submerged breakwaters model indicates a good attenuation effect for larger wave steepness,big relative wave height and within the range of the relative breakwater spacing between 12.5 and 14 according to linear and cnoidal *** changes of wave energy spectra between the double submerged breakwaters on the flat-bed are investigated by the fast Fourier transform(FFT) method,showing that wave energy dissipation can be reached more effectively when the relative breakwater spacing is 12.5.