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題 名 | 波浪通過新月型淺灘變形之研究=A Study on Wave Transformations over a Crescent Shoal |
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作 者 | 許朝敏; 蕭松山; 方惠民; 林銘崇; | 書刊名 | 海洋工程學刊 |
卷 期 | 13:4 2013.12[民102.12] |
頁 次 | 頁327-348 |
分類號 | 443.1 |
關鍵詞 | 非線性效應; 分散性效應; 布斯尼斯克方程式; 新月形淺灘; Nonliner characteristic; Dispersion characteristic; Boussinesq equations; Crescent shoal; |
語 文 | 中文(Chinese) |
中文摘要 | 本文旨在探討波浪通過新月形淺灘地形時的波浪變形現象,由於波浪通過淺灘時因水深變淺導致相對水深變小,波浪非線性效應會增強,使用布斯尼斯克方程式為控制方程式,應用有限差分法解析波浪通過新月形淺灘地形周邊的變形現象,並以Wu(2008)實驗結果驗證本文模式的正確性。研究結果顯示,當波浪正向入射時,實驗結果波高值較數值計算結果為大,且波高集中現象明顯;惟當入射角度增加時,數值模擬結果與實驗結果則趨於一致。新月形淺灘地形有明顯波浪聚焦效應,隨入射波浪週期增加,波高變大集中的現象也愈明顯。 |
英文摘要 | The aim of this article is to investigate the wave transformations over a crescent shoal. Due to the nonlinear effects increases as the relative water depth decreases over a crescent shoal, Boussinesq equations were employed as the governing equations, and the finite differential numerical method was used in this study. The model is verified by the experimental results of Wu (2008). The result shows that the experimental result of wave height is larger than the numerical result and the wave focusing phenomenon is obviously observed. The phenomenon of the wave focus is still observed, and the wave height distributions of the numerical results get closer when the incident angle of waves increases. The wave focusing phenomenon is significant over a crescent shoal; also a trend for wave height gets larger and wave focusing gets more obvious as incident wave period increases. |
本系統中英文摘要資訊取自各篇刊載內容。