Additive Manufacturing of Silencers with Microperforates

Q2 Physics and Astronomy Advances in Acoustics and Vibration Pub Date : 2018-10-14 DOI:10.1155/2018/7649756

Jukka Tanttari, E. Komi, Antti Hynninen, Heikki Isomoisio, Seppo Uosukainen, Virpi Hankaniemi, Mikko Matalamäki

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引用次数: 2

Abstract

A microperforated panel (MPP) is generally defined as a perforated plate, in which the impedance of below one millimetre perforations is dominated by viscous losses. Using MPPs in duct and silencer applications, target is to maximize transmission loss (TL) by choosing proper surface impedance parameters. Additive manufacturing (AM) has recently reduced conventional design limitations and enabled fast prototyping of complex shaped structures. MPP-based model scale silencers can be printed within reasonable time, price, and accuracy. In this paper, design and validation of AM silencers with MPPs are studied. First, the theoretical background of MPP acoustics is summarized. Second, feasible parameters for a MPP absorber for a certain tuning frequency are sought numerically using acoustic finite element method (FEM). Third, several test MPPs are prototyped and their acoustic properties are measured. Finally, MPP silencers are simulated using different approaches and the results are compared against experiments.

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用微孔材料增材制造消声器

微穿孔板（MPP）通常被定义为穿孔板，其中低于一毫米穿孔的阻抗主要由粘性损失决定。在管道和消声器应用中使用MPP，目标是通过选择合适的表面阻抗参数来最大化传输损耗（TL）。增材制造（AM）最近减少了传统设计的限制，并实现了复杂形状结构的快速原型设计。基于MPP的模型尺寸消音器可以在合理的时间、价格和精度内打印。本文研究了带有MPP的AM消声器的设计和验证。首先，概述了MPP声学的理论背景。其次，利用声学有限元法（FEM）对MPP吸收器在一定调谐频率下的可行参数进行了数值求解。第三，对几个测试MPP进行了原型化，并测量了它们的声学特性。最后，使用不同的方法对MPP消声器进行了仿真，并将结果与实验进行了比较。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.