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首页> 外文期刊>Applied Acoustics >Elastic and damping characterizations of acoustical porous materials: Available experimental methods and applications to a melamine foam
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Elastic and damping characterizations of acoustical porous materials: Available experimental methods and applications to a melamine foam

机译：声学多孔材料的弹性和阻尼特性：三聚氰胺泡沫的可用实验方法和应用

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摘要

Acoustical porous materials like polymer foams or mineral wools are widely used in noise and vibration control. The acoustic efficiencies of these materials may be influenced by their elastic and damping properties. It is thus important to determine parameters such as Young's or shear moduli, Poisson's ratios and loss factors. The first objective of this paper is to present a comprehensive list of current available techniques and difficulties faced in the estimations of the elastic and damping parameters for acoustical porous materials. The second objective is to apply the maximum number of these methods to the characterization of a porous material and to discuss the results. In a first part, a brief recall of the mechanical behaviors of acoustical porous materials is given. This part includes a discussion on the influence of viscoelasticity and anisotropy often observed in porous materials. A description of experimental methods used for the elastic and damping characterizations of acoustical porous materials is also given. In total, three groups of quasistatic methods and six groups of dynamic methods are presented. Their main advantages and drawbacks are reported and discussed. In a second part, five of the presented methods are applied to a melamine foam to investigate the frequency and temperature dependences of its elastic and damping parameters. Characterization results are compared and discussed.
机译：诸如聚合物泡沫或矿棉之类的声学多孔材料被广泛用于噪声和振动控制。这些材料的声学效率可能会受到其弹性和阻尼特性的影响。因此，确定诸如杨氏模量或剪切模量，泊松比和损耗因子之类的参数很重要。本文的第一个目的是提供一个完整的清单，列出当前可用的技术以及在估计声学多孔材料的弹性和阻尼参数时面临的困难。第二个目的是将这些方法中的最大数量应用于多孔材料的表征并讨论结果。在第一部分中，简要回顾了声学多孔材料的机械性能。本部分包括对在多孔材料中经常观察到的粘弹性和各向异性的影响的讨论。还给出了用于声学多孔材料的弹性和阻尼表征的实验方法的描述。总共提出了三组准静态方法和六组动态方法。报告和讨论了它们的主要优缺点。在第二部分中，将五种提出的方​​法应用于三聚氰胺泡沫塑料，以研究其弹性和阻尼参数的频率和温度依赖性。比较并讨论了表征结果。

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