A Calculation Method for Incidence and Reflection of Irregular Waves Along Seawalls |
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| Authors: | Zhu Liangsheng Sui Shifeng Associate Professor South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou Professor South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou |
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| Affiliation: | Zhu Liangsheng Sui Shifeng
Associate Professor,South China Sea Institute of Oceanology,Chinese Academy of Science,Guangzhou 510301 Professor,South China Sea Institute of Oceanology,Chinese Academy of Science,Guangzhou 510301 |
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| Abstract: | Some researches have been made in this aspect. In the method by Walton Jr.(1992), incident waves are supposed to be the overlapping result of M component waves with different frequencies which may take different directions, the direction of incident waves should be available in advance, but in fact the direction of incident waves is not available. In our study, incident waves are supposed to be composed of M overlapping component waves with different frequencies, and different frequencies have different directions. Based on the irregular wave reflection theory, the calculation formulas of wave direction, complex amplitude of incident waves, and complex amplitude of reflected waves in surface which are composed of component waves are derived by means of discrete Fourier transform. Then, the frequency spectra of incident waves and reflected waves and the reflection coefficient of waves with corresponding frequencies are obtained. Verification of the method and the calculation results from in-situ measured data indicate that the method is reliable and highly accurate. |
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| Keywords: | irregular wave seawall incidence and refection calculation method |
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