Additive Manufacturing of Silencers with Microperforates
Autor: | Seppo Uosukainen, Erin Komi, Virpi Hankaniemi, Mikko Matalamäki, Heikki Isomoisio, Jukka Tanttari, Antti Hynninen |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
MPP
Acoustics and Ultrasonics Article Subject Computer science Acoustics Transmission loss lcsh:QC221-246 02 engineering and technology 01 natural sciences 0203 mechanical engineering 0103 physical sciences Duct (flow) micro-perforated 010301 acoustics Electrical impedance ta213 Building and Construction Silencer Finite element method silencer AM 020303 mechanical engineering & transports Mechanics of Materials lcsh:Acoustics. Sound Surface impedance Millimeter additive manufacturing |
Zdroj: | Tanttari, J, Komi, E, Hynninen, A, Isomoisio, H, Uosukainen, S, Hankaniemi, V & Matalamäki, M 2018, ' Additive Manufacturing of Silencers with Microperforates ', Advances in Acoustics and Vibration, vol. 2018, 7649756 . https://doi.org/10.1155/2018/7649756 Advances in Acoustics and Vibration, Vol 2018 (2018) |
ISSN: | 1687-627X 1687-6261 |
Popis: | 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. |
Databáze: | OpenAIRE |
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