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題 名 | 非線性重力波浪在緩坡底床上之淺化=Shoaling of Nonlinear Waves Over a Gently Sloping Bottom |
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作 者 | 張憲國; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 11:1 1999.03[民88.03] |
頁 次 | 頁175-180 |
分類號 | 443.1 |
關鍵詞 | 淺化; 非線性波; 能通率; 富立葉級數法; Shoaling; Nonlinear wave; Energy flux; Fourier series approximation; |
語 文 | 中文(Chinese) |
中文摘要 | 本文利用富立葉近似法解析緩坡上波浪淺化問題。 比較其他數值計算結果與淺化 試驗數據及本文之結果,均頗為吻合,此說明本文方法具有高度的數學適用性及物理適用性 來解析非線性波浪淺化。從數值計算淺化係數發現波浪淺化與入射波浪尖銳度有關,當波浪 尖銳度愈大,波浪淺化愈快,反之,波浪尖銳度愈小波浪淺化愈慢。本文進一步從波浪能量 與能通率觀點,說明為何微小振幅波理論之淺化係數與實際波浪淺化有偏差的原因。 |
英文摘要 | The Fourier series approximation method was applied to solving the problem of waves shoaling over a mild slope bottom. Good agreement between of present results and other numerical solutions as well as experimental data was found. This comparison confirms that the present method is mathematically and physically valid. The obtained shoaling coefficients show that shoaling of gravity waves relates to incident wave steepness. The higher the waves go on a sloping beach, the faster the wave shoaling appears. Meanwhile, the reason why the shoaling coefficient of small-amplitude wave theory has large deviation from the present results in shallow water was explained by comparing wave energy and energy flux of both results. |
本系統中英文摘要資訊取自各篇刊載內容。