Study on characteristic parameters identification and low frequency sound absorption performance of polyurethane foam filled with carbonyl iron particles

被引：0
|
作者：
Li R. [1 ]
Zhu H. [1 ,2 ]
Wang C. [2 ]
Geng J. [2 ]
Wang X. [1 ,2 ]
机构：
[1] Engineering Research Center of Automotive Electronics and Embedded System, Chongqing University of Posts and Telecommunications, Chongqing
[2] Institute of Advanced Manufacturing Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Changzhou
来源：
Wang, Xiaojie (xjwang@iamt.ac.cn) | 2018年 / Chinese Academy of Sciences卷 / 48期
关键词：
Carbonyl iron particles; Characterization parameters; Magnetic polyurethane foam; Sound absorption performance; Testing;
D O I：
10.1360/N092017-00377
中图分类号：
学科分类号：
摘要：
In this paper, the addition of carbonyl iron particles addtion and the ratio of polyether polyol and isocyanate on the physical characteristics parameters and sound absorption performance of polyurethane foams (PUF) are investigated to improve the low frequency sound absorption effect of traditional polyurethane foam. Firstly, the least squares method is used to estimate the physical characteristic parameters of magnetic polyurethane foam (MPUF), including flow resistivity, porosity, tortuosity, viscous length and thermal length, based on the Johnson-Champoux-Allard (JCA) acoustic propagation model. At the same time, sound absorption performance of 64-1600 Hz are tested by the transfer function method and impedance tube. The results show that adding carbonyl iron particles can obviously change the physical characteristic parameters of PUF/MPUF with the same ratio of polyether polyol and isocyanate. The flow resistivity and porosity are both increased by 82.9%-211.3% and 0.8%-5.3% respectively, while the tortuosity and the viscous length both decreased by 32.7%-74.5% and 81.4%-94.0% respectively. However, the thermal length has no obvious changes. The PUF/MPUF sound absorption performance of 64-500 Hz is significantly improved, and its low-frequency sound absorption performance can be increased by 64% due to the addition of carbonyl iron particles, especially when the ratio of polyether polyol and isocyanate is 100: 60. The new intelligent MPUF is feasible to meet different functional requirements of the frequency sound absorption and offers references for the intelligent noise abatement device optimization design by MPUF. © 2018, Science Press. All right reserved.
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页码：980 / 990
页数：10
相关论文
共 18 条
  • [1] Schumann M., Seelig N., Odenbach S., The effect of external magnetic fields on the pore structure of polyurethane foams loaded with magnetic microparticles, Smart Mater Struct, 24, (2015)
  • [2] Gong Q., Wu J., Gong X., Et al., Smart polyurethane foam with magnetic field controlled modulus and anisotropic compression property, RSC Adv, 3, pp. 3241-3248, (2013)
  • [3] D'Auria M., Davino D., Pantani R., Et al., Polymeric foam-ferromagnet composites as smart lightweight materials, Smart Mater Struct, 25, (2016)
  • [4] Zielinski T.G., Rak M., Acoustic absorption of foams coated with MR fluid under the influence of magnetic field, J Intell Material Syst Struct, 21, pp. 125-131, (2010)
  • [5] Scarpa F., Bullough W.A., Lumley P., Trends in acoustic properties of iron particle seeded auxetic polyurethane foam, P I Mech Eng C-J Mech Eng Sci, 218, pp. 241-244, (2004)
  • [6] Scarpa F., Smith F.C., Passive and MR fluid-coated auxetic PU foam-Mechanical, acoustic, and electromagnetic properties, J Intelligent Material Syst Struct, 15, pp. 973-979, (2004)
  • [7] Hentati T., Bouazizi L., Taktak M., Et al., Multi-levels inverse identification of physical parameters of porous materials, Appl Acoust, 108, pp. 26-30, (2016)
  • [8] Verdiere K., Panneton R., Atalla N., Et al., Inverse poroelastic characterization of open-cell porous materials using an impedance tube, (2017)
  • [9] Zielinski T.G., Normalized inverse characterization of sound absorbing rigid porous media, J Acoust Soc Am, 137, pp. 3232-3243, (2015)
  • [10] Doutres O., Atalla N., A semi-empirical model to predict the acoustic behaviour of fully and partially reticulated polyurethane foams based on microstructure properties, Acoustics, (2012)
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