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題名 | 港池共振新數值模式之研究 |
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作者 | 張炎生; | 書刊名 | 中正嶺學報 |
卷期 | 23:2 1995.01[民84.01] |
頁次 | 頁43-54 |
分類號 | 443.2 |
關鍵詞 | 能量守恒; 能量消減; 傳輸邊界; 底床摩擦; 緩坡波浪程式; Conservation of energy; Absorbing; Transmitting bottom friction; Mild-slope wave equstion; |
語文 | 中文(Chinese) |
中文摘要 | 港池共振之模式是用以計算港內波浪振幅之大小,以做為港灣工程規 則設計之依據,本研究基於能量守�琠w理,以二維度線性波浪理論,考慮散播性 與非黏性之流體,採混合式有限元素分析法,建立港池共振之數值模式,可計算 離岸或沿岸之任意形狀港口內之波浪振幅大小。本模式基本方程式係採用目前所 公認之緩坡波浪方程式,包括繞射、折射及反射之波浪淺化現象,並考量不等水 深、底床摩擦、消減式固體邊界、及波浪穿透防波堤傳遞能量等諸多實際因素。 本模式可適用於長波與短波各式特性之問題,為了驗證本模式,採用基本矩形之 港型實驗規格,做了各類型測試,與前人學者之研究相比較,並以三維度圖形解 析港內波浪振幅,所得結果非常良好。本模式可算是目前較符合實際因素,研究 港池共振較佳之實用數值模式。 |
英文摘要 | A conservation of energy approach is used to develop a two-Dimensional linear, inviscid, dispersive, hybrid finite element harbor resonance model for calculating waveresponse in an offshore or coastal harbor of arbitrary shape. The numerical model isbased on the mild-slope wave equation which includes wave refraction, diffraction, andreflection; and incorporates variable depth, bottom friction, boundary absorption, andtransmission through permeable breakwaters. The Galerkin finite element method is usedto solve the governing equations. This model can be applied to both long-wave as well asto short-wave problems. The accuracy and efficiency of the present model is verified bycomparing different cases of rectangular harbor numerical results with analytical andexperimental results. These results indicate a good agreement with the predictions of thisnumerical model. The model presented herein is a realistic method for solving harborresonance problems. |
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