Development of a model to assess acoustic treatments to reduce railway noise
Development of a model to assess acoustic treatments to reduce railway noise
Porous materials have recently been used in absorptive treatments around railway tracks to reduce noise emissions. To investigate the effect of porous materials, a finite element model has been developed. 2D models for porous materials have been considered either as an equivalent fluid or as a poroelastic material based on the Biot theory. The two models have been validated and compared with each other to check the effect of the skeleton vibration. The poroelastic FE model has been coupled with a 2D acoustic boundary element model for use in railway applications. The results show that it may be necessary to include the frame vibration, especially at low frequencies where a frame resonance occurs. A method for the characterization of porous materials is also discussed. From this it is shown that the elastic properties of the material determine the resonance frequency and the magnitude.
1-12
Jeong, Hongseok
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Squicciarini, Giacomo
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Thompson, David
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Ryue, Jungsoo
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Jeong, Hongseok
2be64b0a-43e8-4bf6-8c17-0f9177a3fa70
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Ryue, Jungsoo
06336056-2b9b-4620-9c4a-f2cbd602ab3e
Jeong, Hongseok, Squicciarini, Giacomo, Thompson, David and Ryue, Jungsoo
(2016)
Development of a model to assess acoustic treatments to reduce railway noise.
Journal of Physics: Conference Series, .
(In Press)
Abstract
Porous materials have recently been used in absorptive treatments around railway tracks to reduce noise emissions. To investigate the effect of porous materials, a finite element model has been developed. 2D models for porous materials have been considered either as an equivalent fluid or as a poroelastic material based on the Biot theory. The two models have been validated and compared with each other to check the effect of the skeleton vibration. The poroelastic FE model has been coupled with a 2D acoustic boundary element model for use in railway applications. The results show that it may be necessary to include the frame vibration, especially at low frequencies where a frame resonance occurs. A method for the characterization of porous materials is also discussed. From this it is shown that the elastic properties of the material determine the resonance frequency and the magnitude.
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Accepted/In Press date: 12 August 2016
Organisations:
Dynamics Group
Identifiers
Local EPrints ID: 399590
URI: http://eprints.soton.ac.uk/id/eprint/399590
ISSN: 1742-6588
PURE UUID: 9d399bc9-5bda-49a6-a360-204f926e06dd
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Date deposited: 19 Aug 2016 12:43
Last modified: 15 Mar 2024 05:49
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Author:
Hongseok Jeong
Author:
Jungsoo Ryue
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