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研究生:翁志偉
研究生(外文):Wei-Chih Weng
論文名稱:輸砂公式對多方式特性法數值模擬之影響
論文名稱(外文):Effect of different sediment transport formulas on multimode characteristics modeling
指導教授:葉克家葉克家引用關係
指導教授(外文):keh-Chia Yeh
學位類別:碩士
校院名稱:國立交通大學
系所名稱:土木工程系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:132
中文關鍵詞:多方式特性法動床模式粒徑篩分波輸砂公式
外文關鍵詞:multimode characteristics methodmobile-bed modelsediment sorting wavesediment transport formula
相關次數:
  • 被引用被引用:6
  • 點閱點閱:483
  • 評分評分:
  • 下載下載:44
  • 收藏至我的研究室書目清單書目收藏:2
本模式屬於結合演算(coupled)模式,可同時求解水流及輸砂方程式;係以李氏(1992)、Yeh et al.(1995)所發展之非均勻質多方式特性法模式為基礎,再加以改良者。本模式採用較具物理意義之特性法(method of characteristics),引進緩衝段法(buffer reach method)之概念,考慮護甲(armor)作用及交換層(mixing layer)厚度之改變,修正遮蔽因子(hiding factor)或顯露因子(exposure factor)之效應;為了檢驗模式之準確性與適用性,採用Suryanarayana(1969)實驗與台大水工試驗所顏等(1988、1990)之A組實驗案例,選擇不同輸砂公式計算輸砂量,探討淤積及沖刷情況下,底床高程及特性擾動波之變化情形,並加以比較分析。根據模擬結果,選用不同輸砂公式對底床沖淤量及床質粒徑篩分波速有頗大之影響。
The proposed model is a coupled model in which the flow and sediment transport equations are solved simultaneously. It is an extension of the non-uniform sediment multimode characteristics model developed by Lee(1992) and Yeh et al. (1995). In the model, several features are considered: physics-based method of characteristics, buffer reach concept, armor effect, change of mixing layer, and hiding or exposure factor. To verify the accuracy and the applicability of the model, Suryanarayana’s (1969) and Yen et al.’s (1988 & 1990) experimental data are adopted. Several sediment transport formulas are selected to test their effects on the bed evolution and characteristics waves for flows in aggrading and degrading channels. According to the numerical results, selection of different sediment transport formulas will significantly affect the amount of scour or deposition and the associated sorting waves of the bed material.
中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
符號說明 XII
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究內容 3
第二章 理論基礎 4
2.1 基本假設 4
2.2 控制方程式 4
2.3 輸砂方程式 6
2.4 不平衡輸砂率 8
2.5 非均勻沉滓輸砂量之計算 8
2.6 交換層厚度經驗式 10
2.7 水力篩選與河床分層 11
2.8 河床面之護甲作用 11
2.9 特性法方程式 14
2.10 特徵值所代表之物理意義 18
第三章 數值方法 19
3.1 非均勻質多方式特性法(NMMOC) 19
3.2 差分方程式 21
3.3 特徵值及特徵向量之修正法 23
3.4 邊界條件 24
3.4.1 上游邊界條件 24
3.4.2 下游邊界條件 28
3.5 全域矩陣求解 29
3.6 模式演算流程 30
第四章 不同輸砂公式對底床變化及特性擾動波之影響 32
4.1 渠道沖淤模擬 32
4.1.1沖刷案例 33
4.1.1.1 均勻質案例 33
4.1.1.2 非均勻質案例 34
4.1.2淤積案例 35
4.2 沖淤交替案例 38
第五章 結論與建議 42
5.1結論 42
5.2建議 43
參考文獻 45
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