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論文中文名稱:以改良型重錘量測河川水深 [以論文名稱查詢館藏系統]
論文英文名稱:Bathymetry Measurement Using Modified Sounding weigh [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:工程學院
系所名稱:土木工程系土木與防災碩士班
畢業學年度:105
畢業學期:第二學期
出版年度:106
中文姓名:郭軒圻
英文姓名:Xuan-Chi Kuo
研究生學號:104428077
學位類別:碩士
語文別:中文
口試日期:2017/07/24
論文頁數:73
指導教授中文名:陳彥璋
指導教授英文名:Yen-Chang Chen
口試委員中文名:廖翊鈞;楊翰宗;郭俊禎
中文關鍵詞:Fluent鉛魚測深學動網格
英文關鍵詞:FluentSounding WeightBathymetryDynamic Grid
論文中文摘要:颱洪期間水理、水文分析中河川水深資料為一非常重要之參數。過去多採用鉛錘法量測水深,該方法需耗費大量時間與人力且危險性極高。湍急的水流湍造成鉛魚無法垂直地沉入水底測得正確的資料。因此全洪程自動化水深觀測系統規劃及建置中採用機械垂降刀斧型重錘方式來解決兩項缺點,自動化機械系統解決了人力不足及危險性;刀斧型重錘克服傳統鉛魚無法快速沉底的問題。
本研究將以有限體積分析法FLUENT軟體進行三維流場之數值模擬與分析。前置設定選用帶旋流修正之k-ε紊流模式,邊界條件為速度入口及壓力出口,計算區域建置成明渠模型。首先模擬自動化刀斧型重錘以「自由落體方式」與傳統方法「等速方式」下沉比較流場、拖曳距離及受力情形之差異。其次模擬刀斧型重錘與鉛魚同樣以自由落體沉入水中比較兩者沉底之時間與被拖曳的距離。藉由兩項模擬結果都顯示自動化刀斧型重錘搭配水壓計可以有效改善傳統量測方法無法快速下沉及人力有限等問題。最後以全洪程自動化水深觀測系統規畫及建置成果報告中於102年颱風侵台期間以自動化刀斧型重錘搭配水壓計與人工垂降鉛魚方式測深結果相近,用以證明自動化刀斧型重錘搭配水壓計所測得之結果是可以被採用的。
論文英文摘要:In hydrographic analysis, the data of water depth during rainstorms is a very important parameter. In the past, people used sounding weight to measure water depth; however, this conventional method is time consuming, labor density and high risk, also the rapid river caused the sounding weight cannot sink vertically, directly to the bottom of the water, that it can’t measure the correct water depth. In the report of All flood process automated depth Observing System Planning mechanical systems, the 4th river management office adopted mechanical drop modified sounding weight to improve shortcomings, shortage of manpower and dangerous, and the modified sounding weight overcomes the problem that the sounding weight can’t sink quickly.
In this study,three-dimensional computational fluid hydrodynamics software,FIUENT,is adopted to simulate and analysis flow field.The model applies the finite volume discrete control equation and the SIMPLE method coupled velocity and pressure to satisfy the mass conservation and momentum conservation.The first simulation present flow field,distance and force taken difference between the modified sounding weight sink into water in free fall and the convetional sounding weight sink into water in constant speed.The second simulation present time difference between modified sounding weight sink into water and convetional sounding weight sink into water in free fall.From the above simulation,the modified sounding weight can effectively improve the convetional sounding weight shortcomings.Finally,using the new instrument and convetional sounding weight measurement results as verification data in the report of All flood process automated depth Observing System Planning and building.The result prove the new instrument measurement can be used.
論文目次:摘 要 i
ABSTRACT ii
目錄 V
表目錄 VII
圖目錄 VIII
第一章 緒論 1
1.1研究動機 1
1.2研究目的 2
1.3論文架構 2
第二章 文獻回顧 4
2.1水深量測相關研究 5
2.2高流量期間水深量測技術之限制 11
第三章 模式建置介紹與理論分析 13
3.1國內常用三維模式簡介與比較 13
3.2模式介紹 15
3.2.1前處理模組 16
3.2.2求解分析模組 16
3.1.3後處理模組 17
3.3數值模式與求解方法 17
3.2.1控制方程式 17
3.2.2數值離散方法 18
3.2.3離散方法求解 21
3.2.4紊流模式 23
3.2.5動網格 26
3.4模式建置 29
第四章 結果分析與資料驗證 36
4.1不同實測方法模擬及分析 36
4.1.1 流速場分析 37
4.1.2 拖曳距離分析 47
4.1.3重錘壓力分析 49
4.2自由落體比較 54
4.2.1 沉底時間比較 54
4.3資料驗證 56
4.3.1實測資料 56
第五章 結論與建議 69
5.1結論 69
5.2建議 70
參考文獻 71
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