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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 朱錦洲(Chin-Chou Chu) | |
dc.contributor.author | Chi-Min Cheng | en |
dc.contributor.author | 鄭奇泯 | zh_TW |
dc.date.accessioned | 2021-06-15T04:02:33Z | - |
dc.date.available | 2015-03-11 | |
dc.date.copyright | 2010-03-11 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-02-12 | |
dc.identifier.citation | Alben, S., Madden, P. G., et al. 2007. The mechanics of active fin-shape control in ray-finned fishes. Journal of The Royal Society Interface 4(13), 243-256.
Anderson, J. M., Streitlien, K., et al. 1998. Oscillating foils of high propulsive efficiency. Journal of Fluid Mechanics 360, 41-72. Bandyopadhyay, P. 2005. Trends in biorobotic autonomous undersea vehicles. Ieee Journal of Oceanic Engineering 30(1), 109-139. Beal, D. N., Hover, F. S., et al. 2006. Passive propulsion in vortex wakes. Journal of Fluid Mechanics 549, 385-402. Bozkurttas, M., Dong, H., et al. 2006. Hydrodynamic performance of deformable fish fins and flapping foils. AIAA 2006-1392, Reno, Nevada. Castelo, M. 2002. Propulsive Performance of Flexible-Chord Foils. Bachelor of Science Thesis, Department of Ocean Engineering, MIT Chai, W., Yacob, M. I. B. M., et al. 2008. Pitching rigid SD8020 hydrofoil with partially-flexible extension in swimming locomotion. Bioinspiration & Biomimetics Journal. Chang, C. 1992. Potential flow and forces for incompressible viscous flow. Proceedings: Mathematical and Physical Sciences, 517-525. Dickinson, M. 1996. Unsteady mechanisms of force generation in aquatic and aerial locomotion. Integrative and Comparative Biology 36(6), 537-554. Drucker, E. and Lauder, G. 2001. Locomotor function of the dorsal fin in teleost fishes: experimental analysis of wake forces in sunfish. Journal of Experimental Biology 204(17), 35-41. Gopalkrishnan, R., Triantafyllou, M., et al. 1994. Active vorticity control in a shear flow using a flapping foil. Journal of Fluid Mechanics 274, 1-22. Hover, F. S., Haugsdal, O., et al. 2004. Effect of angle of attack profiles in flapping foil propulsion. Journal of Fluids and Structures 19(1), 37-47. Landau, L. and Lifshitz, E. 1959. Fluid mechanics, Pergamon Press. Lauder, G., Madden, P., et al. 2005. Design and performance of a fish fin-like propulsor for AUVs. PhD Dissertation, The George Washington University. Liao, J., Beal, D., et al. 2003. The Karman gait: novel body kinematics of rainbow trout swimming in a vortex street. Journal of Experimental Biology 206(6), 1059-1073. Licht, S., Polidoro, V., et al. 2004. Design and projected performance of a flapping foil AUV. Ieee Journal of Oceanic Engineering 29(3), 786-794. Lighthill, M. 1969. Hydromechanics of aquatic animal propulsion. Annual Review of Fluid Mechanics 1(1), 413-446. Lighthill, M. 1971. Large-amplitude elongated-body theory of fish locomotion. Proceedings of the Royal Society of London. Series B, Biological Sciences 179(1055), 125-138. Mittal, R., Dong, H., et al. 2006. Locomotion with flexible propulsors: II. Bioinspiration & Biomimetics 1, S35-S41. Nauen, J. and Lauder, G. 2002. Hydrodynamics of caudal fin locomotion by chub mackerel, Scomber japonicus (Scombridae). Journal of Experimental Biology 205(12), 1709-1724. Prempraneerach, P., Hover, F., et al. 2003. The effect of chordwise flexibility on the thrust and efficiency of a flapping foil. 13th International Symposium on Unmanned Untethered Submersible Technology, Durham, New Hampshire, USA Rohr, J. and Fish, F. 2004. Strouhal numbers and optimization of swimming by odontocete cetaceans. Journal of Experimental Biology 207(10), 1633-1642. Schouveiler, L., Hover, F., et al. 2005. Performance of flapping foil propulsion. Journal of Fluids and Structures 20(7), 949-959. Sfakiotakis, M., Lane, D., et al. 1999. Review of fish swimming modes for aquatic locomotion. Ieee Journal of Oceanic Engineering 24(2), 237-252. Triantafyllou, G., Triantafyllou, M., et al. 1993. Optimal thrust development in oscillating foils with application to fish propulsion. Journal of Fluids and Structures 7, 205-224. Triantafyllou, M. S., Triantafyllou, G. S., et al. 1991. Wake Mechanics for Thrust Generation in Oscillating Foils. Physics of Fluids A-Fluid Dynamics 3(12), 2835-2837. Vogel, S. 2008. Modes and scaling in aquatic locomotion. Integrative and Comparative Biology 48(6), 702-712. Webb, P. 1994. The biology of fish swimming, Cambridge University Press. Wu, T. 1960. Swimming of a waving plate. Journal of Fluid Mechanics 10(3), 321-344. 陳政宏 2003. 鯊魚裝與機器魚-淺談仿生減阻與仿生推進. 科學發展365期. 陳譽升 2007. 仿生可撓性翼在高效率史徹赫數下的流場分析. 國立台灣大學應用力學所碩士論文. 蔡長志 2007. 仿生撲翼之二維流場與受力量測. 國立台灣大學應用力學所碩士論文. 謝政達 2009. 以力元理論之觀點剖析昆蟲飛行的氣動力機制 國立台灣大學應用力學所博士論文. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45048 | - |
dc.description.abstract | 魚類經過長時間的演化,發展出巧妙的推進方法。因此本文以研究仿生魚游擺尾運動的受力情形為目標,使用NACA0012撓性翼藉由拖曳式水槽、機械手臂與伺服馬達的控制,成功地作出週期性的擺振運動,藉此模擬實驗魚類的擺尾運動。本研究固定拍動振幅 以及雷諾數 ,改變史徹赫數 間隔0.05和擺動角度 間隔 ,藉此探究對推進力及升力的影響。研究發現擺振頻率越高推進力越高,而大擺動角度相對小擺動角度有較大推力峰值的生成,但在小擺動角度且高速拖曳時能有效地減阻並維持較好的推力係數。
透過文獻回顧,撓性翼和剛性翼在推進係數的影響上並無太大差別,因此本文使用部分與實驗相同的參數進行剛性翼數值模擬並透過力元理論分析,比較結果顯示,實驗和數值計算的結果差異不大,足以確認實驗與數值結果。本文利用力元理論的概念,將受力分解並且量化為四個物理項,分別為翼板加速度項、翼板運動速度項、 環境渦度項、和翼板表面渦度項。藉此瞭解主要影響推進機制的關鍵,並且找出在不同參數下各項所佔的比例。本研究發現翼板運動的加速度以及流場環境渦度為主要的推進力的來源。 | zh_TW |
dc.description.abstract | The longstanding evolution has ensured fish which developed the smart propulsion system. This thesis focuses on the force status of Bionic fish swimming in flapping tail motion. Simulating fish flapping tail motion with Naca0012 flexible airfoil undergo pe-riodic oscillating motion by controlling Single-Axis robot and servo motor at the tow tank. Experiments are performed at a fixed value of the heave amplitude and of the Reynolds number to investigate the effects of variations of the Strouhal number by a step of 0.05 and of the maximum pitch angle by a step of . The experimental result indicates that the higher oscillating frequency produces the higher thrust coefficient. Moreover, it is found that the oscillat-ing motion with a high pitch angle produces larger maximum transient peak thrust than a small pitch angle. However, keeping the greater thrust coefficient in the small pitch angle and high-speed towing that can efficiently reduce drag.
According to the literature review, flexible airfoil affects the thrust coefficient in-distinctly relative to rigid airfoil. Therefore, through force elements theory, we can carry out numerical simulations of rigid airfoil with same parameters to observe various force elements contributions. Comparisons between numerical and experimental results show that the trends of total lift and thrust under some conditions are similar. Here, we also decompose and quantify the force into four components: the contribution associated with the acceleration of the airfoil; the contribution by the velocity of the airfoil; the contribution by the surface vorticity and friction on the airfoil; the contribution of pres-sure force due to vorticity within the flow field. This theory identify the main sources of the propulsion system and proportion of the components in the different parameters. The results indicate that acceleration term and vorticity of the flow field term play a rule key in high thrust production in a full flapping. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T04:02:33Z (GMT). No. of bitstreams: 1 ntu-99-R96543081-1.pdf: 7068450 bytes, checksum: 42414785e253e4498ac88ba41ce8b5d2 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 摘要 I
Abstract III 目錄 V 圖目錄 VII 表目錄 XI 符號說明 XIII 第一章 緒論 1 1.1 研究動機 1 1.2 研究背景 1 1.2.1 推進方法 1 1.2.2 魚類結構 2 1.2.3 運動作用力以及運動形態 3 1.3 文獻回顧 3 1.4 全文概述 8 第二章 實驗儀器設備 9 2.1 拖曳式水槽 9 2.1.1 水槽及拖曳平台 9 2.1.2 撓性翼拍動、擺動機構 10 2.1.3 運動控制系統 11 2.2 撓性翼模型 11 2.2.1 翼板模具和材料 11 2.2.2 硬度測試 12 2.3 量力感測器 13 2.3.1 應變規 14 2.3.2 惠斯登電橋 14 2.3.3 起使偏壓 15 2.3.4 受力感測 16 2.4 訊號擷取系統 17 第三章 實驗參數 19 3.1 翼板幾何參數 19 3.2 無因次參數 19 3.2.1 雷諾數(Reynolds number) 20 3.2.2 史徹赫數(Strohual number) 20 3.2.3 約化頻率(Reduced frequency) 21 3.3 力係數 21 3.3.1 平均推力係數 21 3.3.2 平均升力係數 22 3.4 翼板運動軌跡 22 第四章 實驗理論 25 4.1 輔助勢流 25 4.2 力元理論 26 第五章 實驗設定和實驗方法 31 5.1 運動控制設定 31 5.1.1 直線拖曳 31 5.1.2 拍動運動軌跡 31 5.1.3 擺動運動軌跡 32 5.2 信號擷取設定 32 5.2.1 量力訊號校正 32 5.3 實驗條件 33 5.4 實驗方法 33 第六章 實驗結果與分析 35 6.1 雷諾數估算 35 6.2 運動軌跡曲線 35 6.3 量力訊號轉換 36 6.4 實驗設備控制 37 6.5 受力趨勢變化結果圖 37 6.6 結果分析 38 6.6.1 推力峰值和升力峰值分析 40 6.6.2 相同擺動角度,不同St間之平均推力係數關係分析 40 6.6.3 不同擺動角度,相同St間之平均推力係數關係分析 41 6.6.4 平均升力係數關係分析 41 6.7 實驗誤差分析 41 6.8 推進機制來源探討 42 6.8.1 單一周期推力分析 43 6.8.2 擺動角度對平均推力係數關係分析 44 6.8.3 St對平均推力係數關係分析 45 第七章 結論與未來展望 47 7.1 實驗結論 47 7.2 未來展望 48 文獻參考 49 | |
dc.language.iso | zh-TW | |
dc.title | 仿生擺振運動撓性翼之受力量測及分析 | zh_TW |
dc.title | The Measurement and Analysis of Force for Biomimetics of Flexible Airfoil in Oscillating Motion | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-1 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 張建成(Chien-Cheng Chang) | |
dc.contributor.oralexamcommittee | 蕭穎謙,郭光輝,郭志禹 | |
dc.subject.keyword | 仿生推進,擺振運動,力元理論, | zh_TW |
dc.subject.keyword | Bio-inspired propulsion,Oscillating motion,Force elements theory, | en |
dc.relation.page | 94 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-02-14 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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