| 研究生: |
余孟駿 Yu, Meng-Chun |
|---|---|
| 論文名稱: |
複材機翼結構之動態分析 Dynamic Analysis of Composite Wing Structures |
| 指導教授: |
胡潛濱
Hwu, Chyanbin |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 航空太空工程學系 Department of Aeronautics & Astronautics |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 73 |
| 中文關鍵詞: | 顫振 、氣彈 、動態分析 、機翼結構 |
| 外文關鍵詞: | aeroelastic, flutter, wing structures |
| 相關次數: | 點閱:129 下載:18 |
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機翼結構的空氣彈力現象(aeroelastic phenomenon)除了靜態的發散現象(divergence)外,動態的顫振(flutter)也是其中重要的課題之一。過去關於複材機翼的結構模擬大多忽略了機翼本身的翼剖面函數,直到近年來陸續有相關文獻建立了考慮翼形函數的複材夾心板理論,以求更為忠實地表現真實機翼結構模型。
本文將以前述文獻所推出之統御方程式及邊界條件,來研究機翼相關之自由振動、受力振動等動態行為,並針對相關例子輔以商用有限元素法分析軟體來加以比較、驗證。然後加以推廣成考慮含二維不可壓縮流非穩態空氣動力函數(2D incompressible unsteady aerodynamics)作用下之動態方程式,進而推導出探討顫振問題的顫振行列式。接著試著用較為常見的v-g方法、p-k方法等數值方法,來求解機翼之顫振問題,並述及所遭遇之困難。
Aeroelastic phenomenon of composite wing structure contains two principal parts: static divergence and dynamic flutter. In the past, the model of the composite wing structure often neglects the geometric shape of airfoil. It is recently that a composite sandwich wing model taking the airfoil function into account to describe the wing has been established.
This article will use the governing equations and boundary conditions deduced in the composite sandwich wing model to investigate the dynamic behavior such as free vibration and forced vibration, which will then be verified by the commercial finite element software. Moreover, the dynamic equations with subsonic 2D incompressible unsteady aerodynamic loading in the associated flutter problems will be discussed. Several numerical method such as v-g method & p-k method will be used to solve the flutter speed. Some difficulties I met will be discussed, too.
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