Analytical Model of Sound Transmission Through Laminated Composite Cylindrical Shells Considering Transverse Shear Deformation
-
摘要: 由于复合材料结构具有较高的强度-重量比,经常在航空航天工业中广泛使用.在空中声音传输意义上研究声音的传输损耗,通过一个无限层合复合材料圆柱壳体向航行器内部传输.壳体浸泡在外部流体介质中,内部也包含有流体,气流在外部流体介质中以常速流动.根据层合复合材料壳体的一阶剪切变形理论(FSDT),同时求得其精确解和声波方程.求得其传输损耗的数值解并与其它作者的结果进行了比较.在一定数值范围内,研究了结构特性和飞行状态,特别是Mach数、层合的次序及其偏斜角度,对传输损耗值的影响.此外,使用经典薄壳理论(CST)和一阶剪切变形理论(FSDT),比较了层合各向同性复合材料圆柱壳的传输损耗.Abstract: Composite structures are often used in aerospace industries because of advantages offered by a high strength to weight ratio. Sound transmission through an infinite laminated composite cylindrical shell is studied in the context of the transmission of airborne sound into aircraft interior. The shell is immersed in external fluid medium and contains internal fluid, and airflow in external fluid medium is moving with a constant velocity. An exact solution was obtained by solving the first-order shear deformation theory(FSDT) of laminated composite shell and acoustic wave equations simultaneously. Transmission losses(TL) obtained from numerical solution were compared with those of other authors. The effects of structural properties and flight conditions on TL were studied for a range of values, especially, Mach number, stack sequences and angle of warp. Additionally, comparison of the transmission loss was made among classical thin shell theory(CST) and FSDT for laminated composite and isotropic cylindrical shells.
-
Key words:
- plane wave /
- transmission loss /
- laminated composite shell /
- first-order
-
[1] Smith P W.Sound transmission through thin cylindrical shells[J].Journal of the Acoustical Society of America,1957,29(6):721-729. doi: 10.1121/1.1909025 [2] White P.Sound transmission through a finite,closed,cylindrical shell[J].Journal of Acoustical Society of America,1966,40(5):1124-1130. doi: 10.1121/1.1910197 [3] Koval L R.On sound transmission into a thin cylindrical shell under flight conditions[J].Journal of Sound and Vibration,1976,48(2):265-275. doi: 10.1016/0022-460X(76)90465-X [4] Koval L R.On sound transmission into an orthotropic shell[J].Journal of Sound and Vibration,1979,63(1):51-59. doi: 10.1016/0022-460X(79)90376-6 [5] Pope L D,Rennison D C,Willis C M,et al.Development and validation of preliminary analytical models for aircraft interior noise prediction[J].Journal of Sound and Vibration,1982,82:541-575. doi: 10.1016/0022-460X(82)90407-2 [6] Blaise A,Lesueur C,Gptteland M,et al.On sound transmission into an orthotropic infinite shell: comparison with Koval result and understanding the phenomena[J].Journal of Sound and Vibration,1991,150(2):233-243. doi: 10.1016/0022-460X(91)90618-T [7] Blaise A,Lesueur C.Acoustic transmission through a 2-D orthotropic multi-layers infinite Shell[J].Journal of Sound and Vibration,1992,155(1):95-109. doi: 10.1016/0022-460X(92)90648-H [8] Koval L R.Sound transmission into a laminated composite cylindrical shell [J].Journal of Sound and Vibration,1980,71(4):523-530. doi: 10.1016/0022-460X(80)90724-5 [9] Tang Y Y,Robinson J H,Silcox R J.Sound transmission through a cylindrical sandwich shell with honeycomb core[A].In:34th AIAA Aerospace Science Meeting and Exhibit(AIAA-96-0877)[C].Vol 1.Reno,Nevada,USA:1996,877-886. [10] Lee J H,Kim J.Study on sound transmission characteristics of a cylindrical shell using analytical an experimental models[J].Applied Acoustic,2003,64(6):611-632. doi: 10.1016/S0003-682X(02)00138-X [11] Daneshjou K,Nouri A,Talebitooti R. Sound transmission through laminated composite cylindrical shells using analytical model[J].Archive of Applied Mechanics,2007,77:363-379. doi: 10.1007/s00419-006-0096-7 [12] Leissa W A.Vibration of Shells[M].NASA SP- 288,Washington D C: NASA,1973,292-293. [13] Soedel W.Vibrations of Shells and Plates[M].New York: Marcel Dekker Inc,1993,108-152. [14] Howe M.S.Acoustics of Fluid-Structure Interactions[M].New York:Cambridge University Press,2000,33. [15] Fahy F.Sound and Structural Vibration: Radiation,Transmission and Response[M].New York: Academic Press,1985,6. [16] Reddy J.N.Mechanics of Laminated Composite Plates and Shells,Theory and Analysis[M].2nd Ed.Boca Raton :CRC Press,2004,456-475. [17] Qatu M S.Vibration of Laminated Shells and Plates[M].Amsterdam: Elsevier Academic Press,2004,256-297.
点击查看大图
计量
- 文章访问数: 2641
- HTML全文浏览量: 86
- PDF下载量: 521
- 被引次数: 0