Influence of frame parameters of viscoelastic foams on sound-absorbing performance

被引：0
|
作者：
Liu Y. [1 ]
Wang X. [1 ]
机构：
[1] Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing
来源：
Wang, Xiaolin | 1600年 / Chinese Vibration Engineering Society卷 / 35期
关键词：
Biot theory; Frame parameters; Poro-viscoelastic materials; Sound-absorbing performance;
D O I：
10.13465/j.cnki.jvs.2016.20.022
中图分类号：
学科分类号：
摘要：
The influence of frame parameters of poro-viscoelastic materials, including bulk modulus, loss factor, and frame density, on sound-absorbing performance was investigated based on the Biot theory. A quasi-static method was used to measure Young's modulus and Poisson's ratio of a melamine foam. Their influence on sound-absorbing performance was also investigated in terms of these parameters. In addition, the effective density and bulk modulus of the foam were calculated by a model based on static resistivity developed by Dunn and Davern. When sound absorption of the foam with rigid backing was measured, our experiments were consistent with calculated absorption coefficients, which were further decomposed into parts due to damping, viscous, and heat transfer losses. The results show that the damping loss of the foam is small, while the viscous and total losses are significantly reduced around the quarter wavelength resonance frequency. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
引用
收藏
页码：137 / 141and159
相关论文
共 11 条
  • [1] Zwikker C., Kosten W., Sound Absorbing Materials, (1949)
  • [2] Biot M.A., The theory of propagation of elastic waves in a fluid-saturated porous solid. I. low-frequency range, Journal of Acoustical Society of America, 28, pp. 168-178, (1956)
  • [3] Biot M.A., The theory of propagation of elastic waves in a fluid-saturated porous solid. II. high-frequency range, Journal of Acoustical Society of America, 28, pp. 179-191, (1956)
  • [4] Bruneau M., Potel C., Materials and Acoustics Handbook, (2009)
  • [5] Dazel O., Sgard F., Becot F.X., Et al., Expressions of dissipated powers and stored energies in poroelastic media modeled by {u, U} and {u, P} formulations, Journal of Acoustical Society of America, 123, 4, pp. 2054-2063, (2008)
  • [6] Liu Y., Wang X., The influence of viscoelasticity on sound-absorbing performance of porous media, The 21st International Congress on Sound and Vibration, (2014)
  • [7] Allard J.F., Propagation of Sound in Porous Media: Modeling Sound Absorbing Materials, (2009)
  • [8] Jaouen L., Renault A., Deverge M., Elastic and damping charac-terizations of acoustical porous materials: available experimental methods and applications to a melamine foam, Applied Acoustics, 69, pp. 1129-1140, (2008)
  • [9] Langlois C., Panneton R., Atalla N., Polynomial relations for quasi-static mechanical characterization of isotropic poroelastic materials, Journal of Acoustical Society of America, 110, 6, pp. 3032-3040, (2001)
  • [10] Dauchez N., Etchessahar M., Sahraoui S., On measurement of mechanical properties of sound absorbing materials, 2nd Biot Conference on Poromechanics, pp. 1-4, (2002)
12