Sound radiation of a railway rail in close proximity to the ground
Sound radiation of a railway rail in close proximity to the ground
The sound radiation of a railway in close to proximity to a ground (both rigid and absorptive) is predicted by the boundary element method (BEM) in two dimensions (2D). Results are given in terms of the radiation ratio for both vertical and lateral motion of the rail, when the effects of the acoustic boundary conditions due to the sleepers and ballast are taken into account in the numerical models. Allowance is made for the effect of wave propagation along the rail by applying a correction in the 2D modelling. It is shown that the 2D correction is necessary at low frequency, for both vertical and lateral motion of an unsupported rail, especially in the vicinity of the corresponding critical frequency. However, this correction is not applicable for a supported rail; for vertical motion no correction is needed to the 2D result while for lateral motion the corresponding correction would depend on the pad stiffness. Finally, the corresponding numerical predictions of the sound radiation from a rail are verified by comparison with experimental results obtained using a 1/5 scale rail model in different configurations.
111-124
Zhang, Xianying
320e5f8a-84d4-4d23-a062-124a11eedf5c
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
3 February 2016
Zhang, Xianying
320e5f8a-84d4-4d23-a062-124a11eedf5c
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Zhang, Xianying, Squicciarini, Giacomo and Thompson, David
(2016)
Sound radiation of a railway rail in close proximity to the ground.
Journal of Sound and Vibration, 362, .
(doi:10.1016/j.jsv.2015.10.006).
Abstract
The sound radiation of a railway in close to proximity to a ground (both rigid and absorptive) is predicted by the boundary element method (BEM) in two dimensions (2D). Results are given in terms of the radiation ratio for both vertical and lateral motion of the rail, when the effects of the acoustic boundary conditions due to the sleepers and ballast are taken into account in the numerical models. Allowance is made for the effect of wave propagation along the rail by applying a correction in the 2D modelling. It is shown that the 2D correction is necessary at low frequency, for both vertical and lateral motion of an unsupported rail, especially in the vicinity of the corresponding critical frequency. However, this correction is not applicable for a supported rail; for vertical motion no correction is needed to the 2D result while for lateral motion the corresponding correction would depend on the pad stiffness. Finally, the corresponding numerical predictions of the sound radiation from a rail are verified by comparison with experimental results obtained using a 1/5 scale rail model in different configurations.
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Accepted/In Press date: 6 October 2015
e-pub ahead of print date: 23 October 2015
Published date: 3 February 2016
Organisations:
Dynamics Group
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Local EPrints ID: 383035
URI: http://eprints.soton.ac.uk/id/eprint/383035
ISSN: 0022-460X
PURE UUID: c8a11160-40a2-4816-900c-a017d52f4985
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Date deposited: 10 Nov 2015 11:04
Last modified: 15 Mar 2024 05:21
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Author:
Xianying Zhang
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