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DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 伍次寅 | |
dc.contributor.author | Shin-Hao Wu | en |
dc.contributor.author | 吳欣灝 | zh_TW |
dc.date.accessioned | 2021-06-12T18:00:28Z | - |
dc.date.available | 2011-08-15 | |
dc.date.copyright | 2011-08-15 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-08-09 | |
dc.identifier.citation | [1]Lighthill, J. M. (1960). Note on the swimming of slender fish. J. Fluid Mech. 9, pp. 305-317.
[2]Lighthill, M. (1971) Large-amplitude elongated-body theory of fish locomotion. Proc. B. Soc. Lond. 179, pp. 125-138. [3]Sauzadea, M., (2011) Flutter of an elastic plate in a channel flow: Confinement and finite-size effects, Journal of Fluids and Structures, 27(1) ,January, pp. 76-88 [4]Argentina, M. & Mahadevan, L. (2005) Fluid-flow-induced futter of a flag.Proceedings of the National Academy of Sciences of the United States of America 102(6), pp. 1829-1834. [5]Kornecki, A., Dowell, E.,H., O’Brien, J. (1976) On the aeroelastic instability of two-dimensional panels in uniform incompressible flow. Journal of Sound and Vibration 47(2),pp.163-178 [6]Eloy C., Lagrange R., Souilliez C., Schouveiler, L. (2008) Aeroelastic instability of cantilevered flexible plates in uniform flow. J. Fluid Mechanics,611, pp. 97-106. [7]Howell, R. M., Lucey, A. D., (2009) Carpenter, P.W. and Pitman, M.W.Interaction between a cantilevered-free flexible plate and ideal flow. Journal of Fluids and Structures 25(3), pp.544-566 [8]Balint, T. S. and Lucey, A. D. (2005) Instability of a cantilevered flexible plate in viscous channel flow. Journal of Fluids and Structures 20(7),pp.893-912. [9]Tetlow, G. A.,and Lucey, A.D., (2009) Motions of a cantilevered flexible plate in viscous channel flow driven by a constant pressure drop. Communications in Numerical Methods in Engineering Commun. Numer. Meth. Engng 25,pp.463–482 [10] Storti, M. A., Nigroa, N. M., Paza, R. R., Dalcina, L. D.,(2009) Strong coupling Strategy for fluid–structure interaction problems in supersonic regime via fixed point iteration, Journal of Sound and Vibration, 320(4-5), pp.859-877. [11]Teixeiraa,P. R. F., & Awruch, A. M. (2005) Numerical simulation of fluid–structure interaction using the finite element method, Computers & Fluids 34(2), pp. 249-273. [12]Katz, J., & Plotkin, A., (1991) Low-speed Aerodynamics, from wing theory to panel methods, McGraw-Hill series in Aeronautical and Aerospace Engineering,McGraw-Hill, Inc. [13]Kuethe, A., & Chow, C., (1998) Foundations of aerodynamics,New York : J. Wiley [14]Basu, B. C., & Hancock, G. J., (1978)The unsteady motion of a two-dimensional aerofoil in incompressible inviscid flow. J . Fluid Mech., 87(1), pp. 159-178 [15]Gianfranco, C., , (1994) The Lift Computation for an Oscillating Flat Plate in Incompressible Potential Flow. Meccanica 29,pp.43-60 [16]von Karman, T., & Sears, W. R., (1938)Airfoil Theory for Non-Uniform Motion,Journal of the Aeronautical Sciences, 5 (10),pp.378-390. [17] Ramamurti, V. , (2000) Mechanical vibration practice with basic theory, Boca Raton, FL : CRC Press/Narosa Pub. House | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/27297 | - |
dc.description.abstract | 本論文旨在以二維具彈性的平板來模擬魚在水中尾鰭的擺動情形。流場計算上考慮非黏性及非旋性的勢流場來化簡問題,數值方法上採用渦流板格法(vortex panel method)來建構流場,並考慮平板尾端渦流剝離(vortex shedding)的情形,作用在平板上的力則以非穩態伯努力方程式(unsteady Bernoulli equation)來求得。平板形變方面則引用振動學中Euler-Bernoulli 樑方程式來模擬平板的彈性變形與運動,並與流體方程式配合以求得流固耦合(fluid-structure interaction)下之推力,計算之結果則與剛體平板擺動所產生之推力做比較。本文的研究顯示,在平板小幅度擺動下,大多數的彈性變形對於推力並沒有幫助,魚尾若只是單純的藉由被動式的形變擺動是無法有效產生前行的推力。 | zh_TW |
dc.description.abstract | The present study aims at using a two-dimensional flexible flat plate to simulate the swimming motion of a fish. The flow field is assumed to be an inviscid and irrotational potential flow, along with the unsteady Kutta condition to simulate the vortex shedding phenomenon at the end of the flat plate. The vortex panel method is adopted to solve the flow field, and the force acting on the plate is calculated from the unsteady Bernoulli equation. The Euler-Bernoulli beam equation is used to obtain the deformation and transverse motion of the flat plate, which are then coupled with the pressure field of the flow to establish the fluid-structure interaction status. Calculated thrust is compared with that produced by a swinging rigid flat plate. Present results show that, under the assumption of small swinging amplitudes of the plate, the elastic nature of the plate offers no help to increase the thrust in most of the cases. It suggests that the undulating motion of the fish body is not caused by the fluid-structure interaction, a fish can not generate thrust effectively to assist it move forward in the fluid by this passive-type of body motion. | en |
dc.description.provenance | Made available in DSpace on 2021-06-12T18:00:28Z (GMT). No. of bitstreams: 1 ntu-100-R98522319-1.pdf: 1173535 bytes, checksum: 37d859943e5934f828516000bfb4a833 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | 口試委員會審定書 I
致謝 II 摘要 III 英文摘要 IV 圖目錄 VII 表目錄 VIII 第一章 導論 1 1.1 研究背景與動機 1 1.2 研究方法 1 1.3 論文架構 2 第二章 剛體平板擺動所產生之推力計算與結果 3 2.1 二維勢流 3 2.2 流場邊界條件 4 2.3 非穩態KUTTA條件 5 2.4 數值方法 7 2.4.1 渦流板格法 7 2.4.2 離散方程式 10 2.4.3 推力的計算 12 2.4.4 自由渦流的流動 13 2.5 無因次化 15 2.6 計算結果與討論 17 2.8 計算參數的選擇 20 2.9程式正確性測試 23 第三章 簡化幾何邊界條件下的計算結果 25 3.1 引言 25 3.2 邊界條件近似法 26 3.3 誤差比較 29 第四章 平板彈性變形下所產生之推力計算與結果 31 4.1 引言 31 4.2 EULER-BERNOULLI樑方程式 31 4.3 邊界條件與初始條件 33 4.4 離散化 35 4.5 無因次化 38 4.6 誤差評估 39 4.7計算流程 42 4.8結果與討論 45 第五章 結論與未來研究方向 67 5.1 結語 67 5.2 未來研究方向 68 參考文獻 69 附錄A 座標旋轉系統 71 附錄B 板格法邊界條件方程式 74 附錄C 座標旋轉下非穩態BERNOULLI方程式 78 附錄D平板尾端壓力連續條件 83 | |
dc.language.iso | zh-TW | |
dc.title | 以板格法求解二維具彈性平板在勢流場中擺動所產生之推力 | zh_TW |
dc.title | Panel Method Solution of Thrust Produced by a 2-D Elastic Flat Plate Swinging in a Potential Flow | en |
dc.type | Thesis | |
dc.date.schoolyear | 99-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 盧中仁,楊馥菱 | |
dc.subject.keyword | 平板,勢流,板格法,Euler-Bernoulli樑,擺動, | zh_TW |
dc.subject.keyword | flat plate,potential flow,panel method,Euler-Bernoulli beam,swing, | en |
dc.relation.page | 84 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2011-08-09 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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