| 研究生: |
徐瑞鍠 Jui-Huang Hsu |
|---|---|
| 論文名稱: |
應用薄膜法於多孔薄方板受旋轉聲源作用之振動分析與激振後之聲場 Analysis of the vibration and corresponding sound field of the holed plate excited by a rotating sound source. |
| 指導教授: |
黃以玫
Yii-Mei Huang |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 108 |
| 中文關鍵詞: | 輻射聲壓 、繞射聲壓 、旋轉聲源 |
| 外文關鍵詞: | Diffraction, Radiation, Ectoplasm |
| 相關次數: | 點閱:15 下載:0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本文為研究四邊均為簡支邊界之薄方板,當板面上開有矩形且對稱分佈之孔洞時,受旋轉聲源聲壓外力作用時,薄板之運動情形,並探討激振後於薄板之另一面空間中聲場的變化情形。
本文利用“Ectoplasm”方法,以漢彌爾頓定理為基礎,求取四邊為簡支多孔薄方板之運動方程式,於此方法中,整片薄板包括板面上孔洞將被一層薄膜覆蓋,此法可推導得到正定且對角化的質量與勁度矩陣,使解具有唯一性,續以旋轉聲源之聲壓函數取代系統之外力項,探討多孔薄方板受外力激振後之振動與聲場分析,於文中並引入了克赫積分式與格林函數以處理空間聲場中之輻射與繞射聲壓等相關問題。
The purpose of this research is to apply the use of “Ectoplasm” for the vibration analysis and corresponding sound field analysis of the holed plate excited by a rotating sound source.
This formulation allows predication of high order eigenfrequencies and mode shape of a simply supported plate with holes. Such an algorithm can avoid a non-unique problem with ill-conditioned mass and stiffness matrices. In this study, Hamilton’s principle is used to obtain the governing equations. Then, the dynamic responses due to rotating sound source are solved. The Kirchhoff-Helmholtz integral and the Green’s function are used to deal with the acoustic field of the holed plate. Radiation and diffraction of the system is discussed.
白明憲, 2000, “聲學理論與應用-主動式噪音控制,” 全華圖書
李永成, 2001, “平板受聲源作用之振動與輻射聲場分析,” 國立中央大學碩士論文
陳建勳, 2001, “有洞薄方板之動態分析與激振後之聲場,” 國立中央大學碩士論文
陳銘杰, 2004, “多孔薄方板之振動與聲場分析, ” 國立中央大學碩士論文
Aralla, N., and Bernhard, R. J., 1994, “Review if Numerical Solution for Low-Frequency Structural-Acoustic Problems,” Applied Acoustics, Vol. 43, pp. 271-294.
Beslin, O., and Guyader, J. L., 1996, “The Use of an “ECTOPLASM” to Predict Free Vibration of Plates with Cut-Outs”, Journal of Sound and Vibration, Vol. 191(5), pp. 935-954.
Beslin, O., and Guyader, J. L., 1997, “The Use of “ECTOPLASM” to Predict Radiation and Transmission Loss of a Holed Plates in a Cavity”, Journal of Sound and Vibration, Vol. 200(4), pp. 441-465.
Blevins, R. D., 1979, Formulas for Natural Frequency and Mode Shape, Van Nostrand Reinhold, New York, U.S.A.
Dowing, A. P., and Williams, J. E.,1983, Sound and sources of sound: The Sound Field of Moving Sources, Horwood, New York, U.S.A.
Fahy, F., 1985, Sound and Structural Vibration : Radiation, Transmission and Response, Academic Press, London, Britain.
Junger, M. C., and David, F., 1986, Sound, Structures, and Their Interaction, The Acoustical Society of America.
Kinsler, L. E., Frey, A. R., Coppens, A. B., and Sanders J. V., 1982, Fundamentals of Acoustics, John Wiley & Sons, Inc., Canada.
Meirovitch, L., 2001, Fundamentals of Vibrations, McGraw-Hill, Inc., New York, U.S.A.
Wallace, C. E., 1970, “Radiation Resistance of a Rectangular Panel”, The Journal of the Acoustical Society of America, Vol. 51(3) part 2, pp.946-952.