| 姓名 |
吳京霖(Jing-Li Wu )
查詢紙本館藏 |
畢業系所 |
土木工程研究所 |
| 論文名稱 |
砂粒受水平振動行為之研究
|
| 相關論文 | |
| 檔案 |
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| 摘要(中) |
This research examines the behavior of dry sand and sand pile under the forcing of horizontal vibration. Another subject , we use steel spheres to simulate the unstable condition of sand-pile slope.
In the case of horizontal vibrations , The thickness of fluid layar near the surface , H , is propotional to the dimensionless peak vibrational acceleration G and size(length) of the sand box. In the case of sand-pile , there are two types of motions. Initial sand surface collapse and submoving layer. The moving velocity of the surface collapse is faster than the velocity of the moving layer. The moving velocity is propotional G. In the experiment of slope stability , we use steel sphere to simulate the grained stucture of pile surface. Square surface stucture of pile is more stable than triangular surface structure , but in the natural fact ,surface structure of pile is nearly triangular. |
| 摘要(英) |
This research examines the behavior of dry sand and sand pile under the forcing of horizontal vibration. Another subject , we use steel spheres to simulate the unstable condition of sand-pile slope.
In the case of horizontal vibrations , The thickness of fluid layar near the surface , H , is propotional to the dimensionless peak vibrational acceleration G and size(length) of the sand box. In the case of sand-pile , there are two types of motions. Initial sand surface collapse and submoving layer. The moving velocity of the surface collapse is faster than the velocity of the moving layer. The moving velocity is propotional G. In the experiment of slope stability , we use steel sphere to simulate the grained stucture of pile surface. Square surface stucture of pile is more stable than triangular surface structure , but in the natural fact ,surface structure of pile is nearly triangular. |
| 關鍵字(中) |
★ 三角表面堆積
★ 四方表面堆積
★ 振動
★ 流動層
★ 無因次加速度 |
關鍵字(英) |
★ dimensionless peak vibrational acceleration
★ fluid layar
★ sand
★ Square surface stucture
★ triangular surface structure
★ vibration |
| 論文目次 |
目 錄
頁次
摘要 ………..……………………………………………………….Ⅰ
目錄 …..……………………………………………………………..Ⅲ
圖目錄 …..…………………………………………………………..Ⅴ
表目錄 …..…………………………………………………………..Ⅸ
第一章 前言 …..…………………………………………………..1
第二章 文獻回顧 …..……………………………………………..3
2.1 砂的基本物理性質…..………………………………….3
2.2 水平振動對三維顆粒安息角之影響……..…………….4
2.3 土石流體在直立旋轉式水槽內流動現象..…………….4
2.4 無重力影響下牛頓流體中顆粒的離散應力…..……….5
2.5 乾燥砂粒所受剪力與膨脹現象………………………...6
2.6 顆粒間的內摩擦力與膨脹現象………………………...7
2.7 土石顆粒碰撞之探討….………………………………..7
2.8 振台與振級……………………………………………..8
2.9 砂粒經振動後的性質…………………………………..9
2.10 顆粒受水平振動表層液化現象………………………..10
第三章 實驗方法 …..……………………………………………..12
3.1 邊坡顆粒堆積單元穩定實驗 ..…………………….12
3.1.1 顆粒堆積單元靜止狀態臨界角度實驗……12
3.2 顆粒受水平振動之流動層實驗..……………………….17
3.2.1 實驗條件 ..…………………………………17
3.2.2 實驗方法 …………………………………..18
3.3 傾斜砂箱受振後之邊坡穩定實驗 …………………...19
3.3.1 實驗條件 …………………………………..19
3.2.2 實驗方法 …………………………………..19
第四章 結果與討論 ...…………………………………………….21
4.1 邊坡顆粒堆積單元穩定實驗 ……………………….21
4.2 顆粒受水平振動之流動層實驗 …………...……….22
4.2.1 砂粒流動層對各項控制條件的關係 ……..22
4.3 傾斜砂箱受振後之邊坡穩定實驗 ..………………….26
第五章 結論與建議 ………………………………………………28
參考文獻 ……………………………………………………………29 |
| 參考文獻 |
王裕宜、詹錢登、鄒仁元、韓文亮，「甘油砂漿體及泥沙漿體流變特性之實驗研究」，第二屆土石流研討會論文集，第226頁(1999)
周憲德、張藝耀，「三維顆粒堆積受水平振動之斜坡傾角變化」，力學期刊系列B第十六卷，第二期，第153-160頁(2000)
曾森煌、游繁結，「土石流體碰撞機制之探討」， 第一屆土石流研討會論文集，第191頁(1991)
詹錢登、陳晉琪，「土石流體在直立旋轉式水槽內流動現象之初步實驗研究」， 第一屆土石流研討會論文集，第199頁(1997)
劉煌鑫，「消失模鑄造過程中模砂的流動現象」， 國立中央大學機械研究所碩士論文 (1997)
Bagnold R.A.,”Experiments on a gravity-free dispersion of large solid sphere in a Newtonian fluid under shear”pp.49-63(1954)
Bagnold R.A., “The shearing and dilatation of dry sand and the singing mechanism”,pp.219-232(Received 19 April 1966)
Drake T.G., “Structural Features in Granular Flows” ,Ournal of Geophysical research , Vol.95,No.B6,pp.8681-8696 (1990)
Finney J.L.,Proc.R.Soc.London Ser.pp.479 (1970)
Jaeger H.M.and.Nagel S.R〝Physics of the Granular State〞 SCIENCE VL255 (March 1992)
Kolymbas D., “Behaviour of liquefied sand”Phil. Trans. R. Soc. Lond. pp.2609-2622 (April 1998)
Lai P.Y. ,and Bastrukov S., “Oscillatory behavior of a flexible cavity in an incompressible isotropic elastic medium”, (1997)
Thompson P. A. ,and Gary S.Grest “Granular Flow:Friction and Dilatancy Transition” Physical review letters,pp1751-1754(Sep 1991)
Tennakoon S.G.K. , Kondic L. and Behringer R.P., ”Onset of flow in a horizontally vibrated granular bed:Convection by horizontal shearing”Europhysic letters pp.470-475(Feb 1999) |
| 指導教授 |
周憲德(Hsien-Ter Chou)
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審核日期 |
2001-7-12 |
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