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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/18464


    Title: 前飛時尾流及葉片耦合系統之模態辨識及特徵值分析
    Other Titles: A Flapping Mode Identification of Rotary Wing Blades and Wake Coupled System in Forward Flight
    Authors: 王怡仁
    Contributors: 淡江大學航空太空工程學系
    Keywords: 特徵值分析;模態辨識;葉片拍動;尾流動力學;Eigenvalue Analysis;Mode Identification;Blade Flapping;Wake Dynamics
    Date: 1995-12
    Issue Date: 2009-09-01 13:36:50 (UTC+8)
    Publisher: 臺北縣:淡江大學航空工程學系
    Abstract: 特徵值的分析可以判定一個系統的穩定性,而對於氣體彈性力學特徵值的分析而言也是很重要的一部分。本文將用富羅格理論對葉片-尾流耦合系統做特徵值分析,並透過此法對四個葉片的旋翼在前飛時做拍撲運動的各組模態( modes)做辨識及探討。本文發現考慮尾流動力影響與不考慮誘導流系統之旋翼葉片特徵值做比較時,即使在很高的前飛率時,誘導流對葉片動力的影響仍然很大。
    An eigenvalue study can provide stability information for a system, and it is also and important part of aeroelastic analysis. In this work, the blade-wake coupled system eigen- analysis is studied by the Floquet Theory, and the flapping modes for a four-bladed rotor are investigated and identified through their eigenvalues. The eigenvalues of the Floquet matrix can determine system characteristics. The effect of wake dynamics on rotor blade eigenvalues can be seen by comparison with no inflow case. The results show that the inflow has a profound effect on blade dynamics, even at high advance ratios.
    An eigenvalue study can provide stability information for a system, and it is also and important part of aeroelastic analysis. In this work, the blade-wake coupled system eigen- analysis is studied by the Floquet Theory, and the flapping modes for a four-bladed rotor are investigated and identified through their eigenvalues. The eigenvalues of the Floquet matrix can determine system characteristics. The effect of wake dynamics on rotor blade eigenvalues can be seen by comparison with no inflow case. The results show that the inflow has a profound effect on blade dynamics, even at high advance ratios.
    Relation: 第一屆海峽兩岸航空太空學術研討會論文集,頁43-51
    Appears in Collections:[航空太空工程學系暨研究所] 會議論文

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    前飛時尾流及葉片耦合系統之模態辨識及特徵值分析 _中文摘要.docx摘要15KbMicrosoft Word99View/Open
    前飛時尾流及葉片耦合系統之模態辨識及特徵值分析 _西文摘要.docx摘要15KbMicrosoft Word58View/Open

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