Application of multi-layered polyurethane foams for flat-walled anechoic linings

Jingfeng Xu; Jörg M. Buchholz; Fergus R. Fricke

doi:10.1016/j.apacoust.2005.08.002

Application of multi-layered polyurethane foams for flat-walled anechoic linings

Jingfeng Xu^*, Jörg M. Buchholz, Fergus R. Fricke

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Previous work demonstrated that a multi-objective evolutionary algorithm could be successfully employed as an optimiser to make the design of flat-walled multi-layered anechoic linings more efficient. In the present work, such an algorithm is employed to investigate the practical aspects of the application of multi-layered polyurethane foams as the flat-walled anechoic lining. The investigation includes aspects such as the efficacy of a single layer of material, the minimum number of layers of linings to achieve the minimum overall thickness for low (100 Hz), mid (250 Hz) and high (500 Hz) cut-off frequencies, the use of the three-layered lining composite for low to mid cut-off frequencies and the effect of air gaps.

Original language	English
Pages (from-to)	476-485
Number of pages	10
Journal	Applied Acoustics
Volume	67
Issue number	5
DOIs	https://doi.org/10.1016/j.apacoust.2005.08.002
Publication status	Published - May 2006
Externally published	Yes

Keywords

Anechoic termination
Evolutionary algorithms
Flat-walled multi-layered anechoic linings
Polyurethane foams

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10.1016/j.apacoust.2005.08.002

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abstract = "Previous work demonstrated that a multi-objective evolutionary algorithm could be successfully employed as an optimiser to make the design of flat-walled multi-layered anechoic linings more efficient. In the present work, such an algorithm is employed to investigate the practical aspects of the application of multi-layered polyurethane foams as the flat-walled anechoic lining. The investigation includes aspects such as the efficacy of a single layer of material, the minimum number of layers of linings to achieve the minimum overall thickness for low (100 Hz), mid (250 Hz) and high (500 Hz) cut-off frequencies, the use of the three-layered lining composite for low to mid cut-off frequencies and the effect of air gaps.",

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AU - Buchholz, Jörg M.

AU - Fricke, Fergus R.

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AB - Previous work demonstrated that a multi-objective evolutionary algorithm could be successfully employed as an optimiser to make the design of flat-walled multi-layered anechoic linings more efficient. In the present work, such an algorithm is employed to investigate the practical aspects of the application of multi-layered polyurethane foams as the flat-walled anechoic lining. The investigation includes aspects such as the efficacy of a single layer of material, the minimum number of layers of linings to achieve the minimum overall thickness for low (100 Hz), mid (250 Hz) and high (500 Hz) cut-off frequencies, the use of the three-layered lining composite for low to mid cut-off frequencies and the effect of air gaps.

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ER -

Application of multi-layered polyurethane foams for flat-walled anechoic linings

Abstract

Keywords

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