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| 研究生： |
紀智程 Chi, Chih-Cheng |
|---|---|
| 論文名稱： |
應用PIV探討波浪作用下底質始動條件 On the Study of Incipient Motion of Waves Using PIV Techniques |
| 指導教授： |
許泰文
Hsu, Tai-Wen 郭玉樹 Kuo, Yu-Shu |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工學院 - 水利及海洋工程學系 Department of Hydraulic & Ocean Engineering |
| 論文出版年： | 2012 |
| 畢業學年度： | 100 |
| 語文別： | 中文 |
| 論文頁數： | 57 |
| 中文關鍵詞： | PIV 、DIP 、底床最大流速 、底床最大剪應力 |
| 外文關鍵詞： | PIV, DIP, The maximum velocity of flow on the sea bed, The max shear force on the sea bed |
| 相關次數： | 點閱：113 下載：1 |
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往昔對於海床底質顆粒始動條件之相關研究大部份使用接觸式流速儀及肉眼觀測，為提高量測精度及試驗數據之品質，同時探討波浪作用下底質之始動機制，本研究應用高解析度質點影像測速儀（Partical Image Velocimetry，PIV）搭配數值影像處理（Digital Image Processing，DIP）於斷面水槽中進行砂質底床在波浪作用下之底床流速量測，進而對底質始動條件進行探討。
本文量測結果顯示，以底床最大流速及底床最大剪應力推算砂質海床土壤被激發之摩擦角，發現此激發摩擦角不等於安息角，亦不等於內摩擦角。若以激發摩擦角或安息角計算海床土壤之剪力阻抗，發現其遠高於本研究試驗條件波浪造成之底床最大剪應力，除以肉眼觀察外，亦可搭配起動判斷式來判斷底床質是否起動。
The past research most of the seabed particles initiating conditions use contact flow meter and the naked-eye observation, to improve the quality of the measurement accuracy and test data, At the same time explore the sediment under wave action, this thesis use Particle Image Velocimetry （PIV） and Digital Image Processing （DIP） to measure the velocity of flow on the sea bed under wave action , further it aims to investigate sediment transport。
Based on the experimental results , use max velocity and max shear force on the sea bed to get the angle of excitation, it can be found to the angle of excitation is not equal to the angle of repose and internal friction; If it is using to calculate the shear force by the angle of excitation and repose, it can be found the shear force is much higher than the experimental values. In addition to use eyes, it can use the formula to determine the sand will move.
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校內：2015-08-27公開校外：不公開