Modelling and optimisation of sound absorption in replicated microcellular metals

SCRIPTA MATERIALIA

卷:150

Article

Otaru, A. J.¹  Morvan, H. P.¹  Kennedy, A. R.² 

[1] Univ Nottingham, Fac Engn, Gas Turbine & Transmiss Res Ctr, Nottingham NG7 2RD, England

[2] Univ Lancaster, Engn Dept, Lancaster LA1 4YW, England

关键词: Porous material;    Simulation;    Modelling;    Acoustic;    Permeability;   

DOI  :  10.1016/j.scriptamat.2018.03.022

来源: Elsevier

【 摘 要 】

Wilson's poroacoustic model has been shown to be an accurate predictor of sound absorption in porous metals with bottleneck type structures. When used to optimise pore structures, using porosity and permeability as variables, the most broadband absorption is predicted for the highest porosity achievable (approximately 70%) and for a permeability of the order 10(-10) m(2). Although performance close to that for glass wool is not possible, with these porosities, specific strength and stiffness exceeding those for many polymers are obtained, making these materials viable for load bearing components with credible soundproofing. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free