Acoustic modeling of three-dimensional-printed fibrous sound absorbersa).

IF 2.1 2区 物理与天体物理 Q2 ACOUSTICS
Amulya Lomte, Yutong Xue, William Johnston, Guochenhao Song, J Stuart Bolton, Bhisham Sharma
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引用次数: 0

Abstract

In this study, an analytical model was developed to predict the sound absorption performance of fibrous absorbers fabricated using an extrusion-based three-dimensional (3D) printing method. The proposed model employs geometric design parameters, including the average fiber diameter and the horizontal and vertical fiber separations, to calculate the porosity, static airflow resistivity, tortuosity, and viscous and thermal characteristic lengths. These transport parameters are then used within the Johnson-Champoux-Allard semiempirical formulation to predict the normal incidence sound absorption coefficient. The analytical model was validated by comparing the calculated properties with those obtained using the finite element-based hybrid numerical modeling method and those estimated through direct and indirect experimental measurements. Finally, by using the validated analytical model, the effect of each geometrical design parameter on the sound absorption performance of the 3D-printed fibrous absorbers was investigated, revealing that the absorption behavior is primarily controlled by the static airflow resistivity and showing that high absorption peaks and a broadband absorption profile can be achieved by adjusting the three geometrical parameters. This study highlights the potential of 3D printing to fabricate fibrous sound absorbers with tailored acoustic properties, offering a promising solution for advanced noise control materials.

三维印刷纤维吸声器的声学建模。
在这项研究中,建立了一个分析模型来预测使用基于挤压的三维(3D)打印方法制造的纤维吸声材料的吸声性能。该模型采用几何设计参数,包括平均纤维直径、纤维水平和垂直间距,计算孔隙率、静态气流电阻率、扭曲度、粘性和热特性长度。然后在Johnson-Champoux-Allard半经验公式中使用这些输运参数来预测法向入射声吸收系数。通过与基于有限元的混合数值模拟方法的计算结果以及直接和间接实验测量结果进行比较,验证了解析模型的有效性。最后,通过验证的分析模型,研究了各几何设计参数对3d打印纤维吸声性能的影响,揭示了吸声行为主要受静态气流电阻率的控制,并表明通过调整三个几何参数可以实现高吸收峰和宽带吸收剖面。这项研究强调了3D打印在制造具有定制声学特性的纤维吸声器方面的潜力,为先进的噪声控制材料提供了一个有前途的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.60
自引率
16.70%
发文量
1433
审稿时长
4.7 months
期刊介绍: Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.
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