Effect of Hydrostatic Pressure on Acoustic Performance of Sound Absorption Coating

Abstract

Abstract: Based on the two-dimensional analytic model of sound absorption coating which contains cylindrical cavities, the effective impedance of the viscoelastic cylindrical tube was derived by considering the propagating characteristics of the lowestorder axisymmetric wave. The unit cell of sound absorption coating which contains a deformed cylindrical cavity could be approximated as the combination of several uniform cylindrical cavities, and the transmission line theory was applied to describe the unit cell so that the simplified calculation method of the acoustic performance of sound absorption coating was obtained. The finite element software was used to calculate the deformation of the unit cell under the hydrostatic pressure, and the effect of the hydrostatic pressure on the acoustic performance of sound absorption coating was evalu-ated by using the simplified calculation method. The results show that the hydrostatic pressure causes the decrease of the unit cell thickness and the cavity size, both alternations lead to the bad low-frequency sound absorption performance, and the frequency of the peak absorption coefficient being shifted to the high frequency.

Key words: hydrostatic pressure, sound absorption coating, simplified calculation

CLC Number:

TB56

TAO Meng-1, ZHUO Lin-Kai-2. Effect of Hydrostatic Pressure on Acoustic Performance of Sound Absorption Coating[J]. Journal of Shanghai Jiaotong University, 2011, 45(09): 1340-1344.

References

［1］何祚镛, 王曼. 水下非均匀复合层结构吸声的理论研究［J］. 应用声学, 1996, 15(5): 1219.

HE Zuoyong, WANG Man. Investigation of the sound absorption of nonhomogeneous composite multiplelayer structures in water ［J］. Applied Acoustics, 1996, 15(5): 1219.

［2］汤渭霖, 何世平, 范军. 含圆柱形空腔吸声覆盖层的二维理论［J］. 声学学报, 2005, 30(4): 289295.

TANG Weilin, HE Shiping, FAN Jun. Twodimensional model for acoustic absorption of viscoelastic coating containing cylindrical holes ［J］. Acta Acustica, 2005, 30(4): 289295.

［3］何世平, 汤渭霖, 何琳, 等. 变截面圆柱形空腔覆盖层吸声系数的二维近似解［J］. 船舶力学, 2006, 10(1): 120127.

HE Shiping, TANG Weilin, HE Lin, et al. Analysis of acoustic characteristics of anechoic coating containing varying sectional cylindrical cavity ［J］. Journal of Ship Mechanics, 2006, 10(1): 120127.

［4］Hennion A C, Decarpigny J N. Analysis of the scattering of a plane acoustic wave by a doubly periodic structure using the finite element method: Application to Alberich anechoic coatings ［J］. Journal of the Acoustical Society of America, 1991, 90(6): 33563367.

［5］Easwaran V, Munjal M L. Analysis of reflection characteristics of a normal incidence plane wave on resonant sound absorbers: A finite element approach ［J］. Journal of the Acoustical Society of America, 1993, 93(3): 13081318.

［6］姚熊亮, 刘文贺, 刘庆杰, 等. 水深与腔型对隔声去耦瓦吸声系数的影响［J］. 哈尔滨工程大学学报, 2007, 28(6): 605610.

YAO Xiongliang, LIU Wenhe, LIU Qingjie, et al. Influence of depth and cavity shape on absorption coefficients of soundisolating decoupled tiles ［J］. Journal of Harbin Engineering University, 2007, 28(6): 605610.

［7］Panigrahi S N, Jog C S, Munjal M L. Multifocus design of underwater noise control linings based on finite element analysis ［J］. Applied Acoustics, 2008, 69(12): 11411153.

［8］姜闻文, 陈光冶, 朱彦. 静水压变化下橡胶结构吸声性能的计算与分析［J］. 噪声与振动控制, 2006 (5): 5557.

JIANG Wenwen, CHEN Guangye, ZHU Yan. Computation and analysis of sound absorption performance of rubber structures under variable hydraulic pressure ［J］. Noise and Vibration Control, 2006 (5): 5557.

[1]	HUANG Xiuchanga,ZHU Beilia,HU Penb,HUA Hongxinga. Measurement of Dynamic Properties of Rubber under Hydrostatic Pressure by Water-filled Acoustic Tube [J]. Journal of Shanghai Jiaotong University, 2013, 47(10): 1503-1508.
[2]	TAO Meng-1, ZHUO Lin-Kai-2. Acoustic Performance of Sound Absorption Coating Containing Composite Cavities [J]. Journal of Shanghai Jiaotong University, 2013, 47(03): 408-412.