Efficient Model for Acoustic Attenuators using the Method of Fundamental Solutions

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2018-01-01 DOI:10.20855/IJAV.2018.23.11148

E. Costa, L. Godinho, J. Santiago, W. Mansur

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引用次数: 1

Abstract

In this work, the three-dimensional formulation of the Method of Fundamental Solutions (MFS) is applied to model acoustic problems in the frequency domain. This formulation is developed by making use of adequate Green’s function defined by the image-source technique, reducing the discretization necessary for the definition of the numerical model. The proposed approach is applied to study the sound attenuation provided by an acoustic attenuating device, consisting of a closed acoustic space located between inlet and outlet tubes. Absorbent properties of the lining materials of the acoustic device, defined using laboratory measurements of their absorption coefficients, are incorporated into the model. The proposed model is verified against reference numerical models based on a boundary integral equation formulation. An experimental validation is also performed, demonstrating that the model adequately simulates the sound propagation under experimental conditions. Numerical applications are then presented to demonstrate the behaviour of the system under different conditions.

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基于基本解方法的声衰减器有效模型

在这项工作中，基本解方法(MFS)的三维公式应用于频域声学问题的建模。这个公式是通过充分利用由图像源技术定义的格林函数来开发的，减少了定义数值模型所必需的离散化。所提出的方法被应用于研究由位于进出口管之间的封闭声空间组成的声衰减装置所提供的声音衰减。声学装置衬里材料的吸收特性，使用实验室测量的吸收系数来定义，被纳入模型。根据边界积分方程公式与参考数值模型进行了验证。实验验证表明，该模型能较好地模拟实验条件下的声音传播。然后给出数值应用来演示系统在不同条件下的行为。

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

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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