臺灣博碩士論文加值系統

本文旨在探討以不同水深、波高、週期的規則波浪通過不同孔隙底床的波高衰減情形。除了測得的孔隙率外，以無因次化關係建立無因次化參數群:波高衰減因子( 、波浪尖銳度、波高水深比、 Ur、無因次化波長距離 ，且利用波高衰減因子建立不同孔隙底床下，波高衰減與波浪條件的迴歸方程式。

試驗結果顯示孔隙率大的底床、無因次化波長距離越長及波浪尖銳度大的情況下，會有較大的波浪衰減率。且通常較大的入射波高會產生較小的波高衰減因子，且得到孔隙率大的底床隨水深條件越淺時其消散長波的能力越佳之結論。也得到：當波浪通過5∼7個無因次化波長後，其波高衰減因子的下降幅度也隨之和緩。

This study explored the damping phenomena of wave.

While the wave pass through the different porous bed,causing to decrease the wave height.In this study,the experiment conditions were used to simulate the situation,including the different water depth,incident wave height and period,and get the porous rate and wave height.

Utilizing these results to obtain dimensionless factors to show the relationship of the wave height and wave length,wave height,wave depth,et al..From the solutions,the effect of the wave damping was obvious under conditions of which are long wave,big porous bed and wave stepness.Besides,the more bigger wave height was, the more smaller the wave decay factor.

The decay appearance of the wave height was not conspicuous after the wave processed the distance after 5~7 wavelength.

In addition ,to demonstrate the more lower the water depth was,the more better the dispersion of long wave was.

中文摘要 4
英文摘要 5
謝誌 6
表目錄 9
圖目錄 10
照片目錄 13
符號說明 14
第一章 序論 15
1-1 研究動機 15
1-2 文獻回顧 17
1-3 本文組織 18
第二章 試驗設計與步驟 19
2-1 因次分析 19
2-2 試驗設備 21
2-2-1 試驗水槽與造波機 22
2-2-2 底床模型與佈置 24
2-2-3 波高計、電源供應器及訊號放大器 30
2-3 試驗條件 31
2-4 試驗步驟 34
2-5 資料擷取與分析 36
2-5-1 水位資料擷取方法 36
2-5-2 波高、週期之計算 36
2-5-3 反射率量測 36
第三章 試驗結果與討論 39
3-1 無因次化波長距離對波高衰減因子的影響 39
3-2 波高水深比對波高衰減因子的影響 51
3-3 波浪尖銳度與波高衰減關係 55
3-3-1 波浪尖銳度與波高衰減因子的關係 55
3-4 非線性參數r U 對波高衰減因子的影響 61
3-5 建立波高衰減因子經驗方程式 66
3-5-1 建立孔隙底床A 的迴歸方程式 66
3-5-2 建立孔隙底床B 的迴歸方程式 68
第四章 結論與建議 70
4-1 結論 70
4-2 建議 73
參考文獻 74

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