揭开隔声物理学的神秘面纱:多层流动电阻率估算

IF 1.6 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
M. Sadouki
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引用次数: 0

摘要

本文介绍了一种计算方法,旨在精确估算多层刚性多孔材料中等效流动电阻率的物理规律,特别关注隔声系统中的应用。虽然现有模型能够预测声音在单层材料中的传播,但它们缺乏多层材料流动电阻率与其组成层特性之间的直接理论分析联系。为了弥补这一不足,本研究利用了等效流体理论,该理论综合了材料结构与间隙流体之间的粘惯性相互作用。通过建立低频达西条件下双层介质传输系数的简化表达式,论文引入了一种新的估算方法。此外,它还在双层介质的电阻率与每层的电阻率和厚度之间建立了简明的关系,这种关系可扩展到多层结构。双层样品的实验验证表明,直接获得的等效通量电阻率与理论预测值之间存在显著的一致性,相对误差在 3% 到 18% 之间。本文的意义在于它对隔音系统的实际影响,因为隔音性能的准确预测至关重要。研究引入了一种可靠的物理关系,用于估算多层板的等效流动电阻率,该关系是每个组成层的流动电阻率及其厚度的函数,提供了与经验数据的理论关联,并提供了劳动密集型实验方法和软件的替代方案。这项对声学的贡献有助于准确预测和描述多层材料的声学特性,从而帮助设计有效的噪声控制系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Unveiling the physics of acoustic insulation: multilayer flow resistivity estimation

Unveiling the physics of acoustic insulation: multilayer flow resistivity estimation

This paper presents a computational methodology aimed at precisely estimating the physical law governing equivalent flow resistivity in multilayer rigid porous materials, with a specific focus on applications in acoustic insulation systems. While existing models are capable of predicting sound transmission through individual layers, they lack a direct theoretical analytical link between the flow resistivity of multilayer materials and the properties of their constituent layers. To address this gap, the study harnesses equivalent fluid theory, which integrates visco-inertial interactions between the material structure and the interstitial fluid. By establishing simplified expressions for the transmission coefficient of a bilayer medium under low-frequency Darcy conditions, the paper introduces a novel approach to estimation. Furthermore, it formulates a concise relationship between the resistivity of the bilayer medium and the resistivity and thickness of each layer, which extends to multilayer configurations. Experimental validation with bilayer samples demonstrates significant agreement between the directly obtained equivalent flux resistivity and the theoretically predicted values, with relative errors ranging from 3 to 18%. The significance of this paper lies in its practical implications for acoustic insulation systems, where accurate predictions of acoustic performance are crucial. The research introduces a reliable physical relationship for estimating the equivalent flow resistivity of a multilayer as a function of the flow resistivity of each constituent layer and its thickness, offering theoretical correlation with empirical data and providing an alternative to labor-intensive experimental methods and software. This contribution to acoustics facilitates accurate prediction and characterization of the acoustic properties of multilayer materials, thereby aiding in the design of effective noise control systems.

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来源期刊
Indian Journal of Physics
Indian Journal of Physics 物理-物理:综合
CiteScore
3.40
自引率
10.00%
发文量
275
审稿时长
3-8 weeks
期刊介绍: Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
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