Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/15872
標題: 二維雙方柱氣動力干擾現象之研究
A study of the aerodynamic interference effects of twin cylinders with a square close section
作者: 王世偉
Wang, Shi-Wei
關鍵字: twin square cylinders;二維雙方柱;aerodynamic damping;橫風向位移反應;氣動力阻尼;共振風速
出版社: 土木工程學系所
引用: [1] Hayashida, H., Mataki, Y. and Iwsas, Y., “Aerodynamic Damping Effects of Tall Building for a Vortex Induced Vibration,” Journal of Wind Engineering and Industrial Aerodynamics, Vol. 41-44, pp. 1973-1983, 1992. [2] Steckley, A., Motion-Induced Wind Force on Chimneys and Tall Buildings, Ph.D. thesis, University of West Ontario, 1989 [3] Vickery, B. J. and Cook, A.W., “Lift or Across-wind Response of Tapered Stacks”, Journal of Structure Division, ASCE, Vol. 98(ST1), pp. [4] Simiu, E. and Scanlan, R.H., Wind Effect on Structures, John Wiley & Sons, New York, 1986. [5] Davenport, A. G., Inst. Civil Eng. Paper No.6480, (August, 1961) pp. 449-472. [6] Kawai, H., “Vortex Induced Vibration of Tall Buildings”, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 41-44, pp.117-128, 1992. [7] 陳若華;鄭啟明。「振態耦合對高層建築風力動態反應之影響」, 中華民國第二屆結構工程研討會論文集:頁505-514(民國83年)。 [8] Cheng, C.M., Lu, P.C. and Tsai, M.S., “Acrosswind aerodynamic damping of isolated square-shaped buildings”, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 90 1743–1756,2002. [9] 邱子文,「二維方柱體受強制振動之氣動力研究」,淡江大學水 資源及環境工程研究所碩士論文(1994)。 [10] 黃俊宏、陳若華、盧博堅、鄭啟明,「均勻紊流場中二維方柱受強制振動之氣動力研究」,中華民國第十九屆全國力學會議,台北市,第265-274頁(1995)。 [11] 高忠人,「紊流場中振動矩柱之尾跡現象研究」,淡江大學水資源及環境工程研究所碩士論文(1996)。 [12] Sakamoto, H. and Haniu, H., “Effect of free-stream turbulence on characteristics of fluctuating forces acting on two square prisms in tandem arrangement,”Transactions ASME, j. of fluids engineering, vol. 110,pp. 140-146(1988). [13] Kubo,Y., Miyazki, M. & Kato, K. (1989),“Effects of end plates and blockage of structural members on drag forces”, J. Wind Engg. and Ind. Aerod., Vol.32, pp.329-342. [14] Hunt, A. (1982),“Wind tunnel measurement of surface pressure on cubic building models at several scales” J. Wind Engg. and Ind. Aero., Vol.10, pp.137-163. [15] Bearman,P. W. and Truman, D. M. (1972),”An Investigation of the Flow Around Rectangular Cylinder,”Aero. Quartely, Vol.23,pp.229~237. [16] Okajima, A.(1982),”Strouhal Numbers of Rectangular Cylinders,” J. Fluid Mech, Vol.123,PP.279-398. [17] Okajima, A. Sugitani, K. and Mizota, T.(1984),”Fluid characteristics of two rectangular cylinders arranged side-by-side,” Bull. Res. Inst. App. Mech. Kyushu Univ. 60 59-87. [18] Lee B. E.(1990),”Some Observations of the Effect of Aspect Ratio on the Influence of Turbulence on the Drag of Rectangular Cylinders”, j. Wind Engg. and ind. Aerod., Vol.33, pp.107-111. [19] Sun, T. F. Gu, Z. F. ,(1995),”Interference between wind loading on group of structure.” J. Wind Engg. and Ind. Aerod., Vol.54-55, pp.213-225. [20] Nakamura, Y. and Ohya, Y. ,“The Effects of Turbulence on the Mean Flow past Two Dimensional Rectangular Cylinders,” Journal of Fluid Mechanics, Vol. 149, pp. 255-273, 1984.
摘要: 
為了對群體形式之高層結構物受風作用的氣動力現象作更進一步的了解,本研究針對二維雙方柱在不同間距排列位置下進行風洞實驗,探討下游柱體受風作用所產生的垂直向位移反應。希望能藉由單方柱的氣動力資料出發,以修正外力載重的方式,表現出雙方柱的氣動力干擾行為,並建立出經驗模式,而希望未來能與三維柱體實驗成果相互比較。
研究結果發現,雙方柱因不同間距位置的排列方式,下游方柱會因上游方柱的影響,產生加強或是抑制垂直向位移的氣動力反應,並且會影響我們預測共振風速位置,於是針對固定雙方柱做風力頻譜分析,發現由於雙方柱柱體與柱體間相互影響流場,改變了柱體的渦散頻率,因此共振風速無法由單柱推估出,於是針對雙方柱的排列位置進行分析找出相關的經驗式,由經驗式與各位置氣動力阻尼值,求出雙方柱在各位置下的橫風向位移反應,與實驗值相比較下發現有不錯的吻合。

In order to be done further understanding the tall buildings by the aerodynamic phenomenon of wind. This research carries on the experiment of wind-tunnel under the circumstances that different intervals arrange the position to twin cylinders with a square close section. To confer the downstream cylinder to incur wind loading to produce vertically response. Hope to understanding aerodynamic data of the single square cylinders, by way of set up experience formula. Demonstrate of the aerodynamic interference effects of twin cylinders with a square close section, and hope tocompare each other with the experiment achievement of 3-D cylinder in the future.
Different intervals position of twin square cylinders, will be produced strengthened or suppressed vertically response and will influence us to predict the position of wind speed of resonance. Find that because flow field influences each other among the twin square cylinder. Then analyse that find out relevant experience formula of twin square cylinder in the permutation position. By the experience formula to calculate aerodynamic damping and vertically response, find the same as experiment value.
URI: http://hdl.handle.net/11455/15872
其他識別: U0005-2508200811474000
Appears in Collections:土木工程學系所

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