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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87853

    Title: 大型風力發電機扇葉之抖振反應分析
    Other Titles: Buffeting analysis of large wind turbine blade
    Authors: 劉牧宇;Liu, Mu-Yu
    Contributors: 淡江大學土木工程學系碩士班
    林堉溢;Lin, Yuh-Yi
    Keywords: 風力發電機扇葉;顫振分析;抖振反應;flutter Analysis;buffeting analysis;Wind Turbine Blade
    Date: 2013
    Issue Date: 2013-04-13 11:48:22 (UTC+8)
    Abstract: 台灣地理位置四面環海適合發展風力發電,但也是位屬於颱風侵襲地帶,也曾出現風力發電機損壞的報導,儘管國內外的研究者對於扇葉的性質、材料、形狀早已經研究多年。因現階段風力發電扇葉分析比較缺乏動態影響分析和抖振反應的研究,所以本文利用結構風工程的觀點來分析風力發電機扇葉受風力作用下之顫振及抖振反應進行探討。
    Since Taiwan is surrounded by sea and is in the typhoon-prone area, it is an appropriate place for developing wind power. However, some damages of wind turbine blades have been reported. Although the aerodynamic behavior of wind turbine blades have been investigated and discussed in many literatures, the buffeting responses of wind turbine blades were seldom studied. The purpose of this thesis is to investigate the flutter wind speeds and the buffeting responses of wind turbine blades by using an analytical approach based on flutter and buffeting theories.
    To simplify the analysis, the wind turbine blade was assumed to be horizontal and modeled as a cantilever beam. The static wind force coefficients and the flutter derivatives of airfoils, adopted from literatures, were used in the analysis. The complex eigen-value analysis was used to calculate the flutter wind speed of the wind turbine blade. The buffeting responses of the blade were analyzed based on a spectral analysis.
    To examine the validity of this analysis, the flutter wind speed of an airfoil was evaluated first. It can be found that the results agree well with those in the literatures. Two types of wind turbine blades were then studied in this thesis. As the mean wind velocity is less than 100m/s, there is no flutter identified in these blades. This is because the torsional frequencies of these blades are very high. The results also indicated that the buffeting responses in the vertical direction are more significant than those in the drag and torsional directions. Using the vertical displacement, the equivalent static wind loads were then generated and used for the calculations of the maximum stresses in the blades.
    Appears in Collections:[土木工程學系暨研究所] 學位論文

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