| 研究生: |
陳銘杰 Ming-Jie Chen |
|---|---|
| 論文名稱: |
多孔薄方板之振動與聲場分析 |
| 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: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 163 |
| 中文關鍵詞: | 繞射聲壓 、輻射聲壓 、模態 |
| 外文關鍵詞: | Ectoplasm |
| 相關次數: | 點閱:7 下載:0 |
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本文乃是討論當平板開有孔洞時,以點聲源激振平板,分析有孔平板之振動及聲壓變化情形。
為了更進一步知道孔洞對平板振動及聲壓的影響,在平板上開四個方形的孔洞,且應用“Ectoplasm”之方法及觀念,並利用漢彌頓定理推導有洞薄方板的運動方程式,計算自然頻率並觀察其變動情形。當點聲源位於有孔平板中心且距平板高度固定時,以不同聲源頻率激振平板,然後比較其所得之位移。
在聲場方面,分析板面振動產生之輻射聲壓及孔洞所產生之繞射聲壓的影響,並引入克赫積分方程式及格林函數來處理有孔平板之輻射與繞射的相關問題,最後並比較孔洞位置、孔洞大小對聲壓之變化情形。
This paper is discusses the vibration and corresponding sound field of the holed plate excited by a point sound source. The plate is perforated into four holes in the center of symmetry. The vibration analysis is based on the technique of the “Ectoplasm”. The equation of motion of the plate is derived by the Hamilton’s principle. The dynamic response of the plate excited by a point sound source is solved.
In order to deal with the acoustic field of the holed plate, the Kirchhoff-Helmholtz integral and the Green’s function are used. The sound pressure distribution of the plate is investigated with different positions of the holes.
白明憲, 2000, “聲學理論與應用-主動式噪音控制-,“ 全華
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
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.
Fahy, F., 1985, Sound and Structural Vibration : Radiation, Transmiss-
ion and Response, Academic Press, London, Britain.
Junger, M. C., and David, F., 1993, Sound, Structures, and Their Inter-
-action, 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.
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.