| Bragg Reflection of Waves by Different Shapes of Artificial Bars |
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| 作者姓名： | HSU Tai-Wen |
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| 作者单位： | Department of Hydraulic and Ocean Engineering，National Cheng Kung University，Tainan 701，Department of Civil Engineering，National Chiao Tung University，Hsinchu 300，Center of Harbor and Marine Technology，Institute of Transportation，Ministry of Transportation and Communications，Wuchi，Taichung 435 |
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| 摘 要： | Experiments are performed in a wave flume to demonstrate the Bragg reflection of linear gravity waves by artificial bars. Three different artificial bars with rectangular, triangular and rectified cosinoidal shapes are placed discretely on the seabed for measurement of the Bragg reflection. A series of experimental conditions including the number of bars, the pe-riodic bar spacing, the water depth and various wave conditions are tested. Key parameters influencing the Bragg resonances are investigated. The experimental data are compared with the values from both theoretical and numerical models. Some key parameters have proved to be effective in describing the primary resonances. Predictive equations of the charac-teristics for the Bragg reflection are proposed in this paper.
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Bragg Reflection of Waves by Different Shapes of Artificial Bars |
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| HSU Tai-Wen CHANG Hsien-Kuo and TSAI Li-Hung.Bragg Reflection of Waves by Different Shapes of Artificial Bars[J].China Ocean Engineering,2002,16(3):343-358. |
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| Authors: | HSU Tai-Wen CHANG Hsien-Kuo and TSAI Li-Hung |
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| Institution: | Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan 701 Department of Civil Engineering, National Chiao Tung University, Hsinchu 300 Center of Harbor and Marine Technology, Institute of Transportation, Ministry of Transportation and Communications, Wuchi, Taichung 435 |
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| Abstract: | Experiments are performed in a wave flume to demonstrate the Bragg reflection of linear gravity waves by artificial bars. Three different artificial bars with rectangular, triangular and rectified cosinoidal shapes are placed discretely on the seabed for measurement of the Bragg reflection. A series of experimental conditions including the number of bars, the pe-riodic bar spacing, the water depth and various wave conditions are tested. Key parameters influencing the Bragg resonances are investigated. The experimental data are compared with the values from both theoretical and numerical models. Some key parameters have proved to be effective in describing the primary resonances. Predictive equations of the charac-teristics for the Bragg reflection are proposed in this paper. |
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| Keywords: | waves Bragg reflection higher-harmonic resonance artificial bars |
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