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Wave decomposition phenomenon and spectrum evolution over submerged bars
作者姓名:LI Benxi  YU Xiping
作者单位:LI Benxia(National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081,China);YU Xiping(Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China) 
基金项目:The National Natural Science Foundation of China for Distinguished Young Scholars under contract No. 50025925;;the Chinese Postdoctoral Science Foundation under contract No. 20040350088
摘    要:Wave decomposition phenomenon and spectrum evolution over submerged bars are investigated by a previously developed numerical model. First, the computed free surface displacements of regular waves at various locations are compared with the available experimental data to confirm the validity of the numerical model, and satisfactory agreements are obtained. In addition, variations of decomposition characteristics with incident wave parameters and the change of energy spectrum for regular waves are also studied. Then the spectrum evolution of irregular waves over submerged bars, as well as the influence of incident peak wave period and the steepness of the front slope of the bar on spectrum evolution, is investigated. Wave decomposition and spectral shape are found to be significantly influenced by the incident wave conditions. When the upslope of the bar becomes 1:2, the length of the slope becomes shorter and will not benefit the generation of high frequency energy, so spectrum evolution is not significant.

关 键 词:频谱分解  酒吧  淹没  发展史  不规则波  高频能量  无线电频谱  数学模型
收稿时间:2007/5/25 0:00:00
修稿时间:9/9/2008 12:00:00 AM

Wave decomposition phenomenon and spectrum evolution over submerged bars
LI Benxi,YU Xiping.Wave decomposition phenomenon and spectrum evolution over submerged bars[J].Acta Oceanologica Sinica,2009,28(3):82-92.
Authors:LI Benxia and YU Xiping
Institution:1.National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China2.Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
Abstract:Wave decomposition phenomenon and spectrum evolution over submerged bars are investigated by a previously developed numerical model. First, the computed free surface displacements of regular waves at various locations are compared with the available experimental data to confirm the validity of the numerical model, and satisfactory agreements are obtained. In addition, variations of decomposition characteristics with incident wave parameters and the change of energy spectrum for regular waves are also studie...
Keywords:wave decomposition  spectrum evolution  nonlinear waves  irregular waves  submerged bars
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