The influence of the vehicle body on the sound radiation from the rail
The influence of the vehicle body on the sound radiation from the rail
Numerical models and vibro-acoustic measurements are used to assess the effect of reflections from the underside of a railway vehicle on the sound radiation from the rail. A 2D boundary element model is used in which the rail vibrates uniformly in either vertical or lateral directions; various different shapes of vehicle body are introduced into the model. Measurements are performed on a 1:5 scale model and on a full-size track with and without a metro vehicle. The presence of the vehicle primarily affects the sound pressure from the vertical vi-bration of the rail, with negligible effect for the lateral vibration. The vehicle body reflects the sound back down towards the track where it is partly absorbed by the ballast, reducing the sound power. Nevertheless, the sound pressure at the trackside is increased by 0-5 dB and in some frequency bands by up to 9 dB. Finally, it is shown that the sound radiation in the presence of the vehicle can be approximated reasonably well with simple line source formulae.
rolling noise, sound radiation, reflections, boundary element
Zhao, Dong
68edf852-499c-451b-9f75-041af9dd96ed
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Ntotsios, Evangelos
877c3350-0497-4471-aa97-c101df72e05e
Cierco, Ester
20120c7e-b3dc-4292-af5f-824e0c5c33b9
Jansen, Erwin
5a43b7a9-0534-4597-bb65-6c6fbb3b2231
December 2022
Zhao, Dong
68edf852-499c-451b-9f75-041af9dd96ed
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Ntotsios, Evangelos
877c3350-0497-4471-aa97-c101df72e05e
Cierco, Ester
20120c7e-b3dc-4292-af5f-824e0c5c33b9
Jansen, Erwin
5a43b7a9-0534-4597-bb65-6c6fbb3b2231
Zhao, Dong, Thompson, David, Ntotsios, Evangelos, Cierco, Ester and Jansen, Erwin
(2022)
The influence of the vehicle body on the sound radiation from the rail.
14th International Workshop on Railway Noise, Shanghai, China, , Shanghai, China.
07 - 09 Dec 2022.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Numerical models and vibro-acoustic measurements are used to assess the effect of reflections from the underside of a railway vehicle on the sound radiation from the rail. A 2D boundary element model is used in which the rail vibrates uniformly in either vertical or lateral directions; various different shapes of vehicle body are introduced into the model. Measurements are performed on a 1:5 scale model and on a full-size track with and without a metro vehicle. The presence of the vehicle primarily affects the sound pressure from the vertical vi-bration of the rail, with negligible effect for the lateral vibration. The vehicle body reflects the sound back down towards the track where it is partly absorbed by the ballast, reducing the sound power. Nevertheless, the sound pressure at the trackside is increased by 0-5 dB and in some frequency bands by up to 9 dB. Finally, it is shown that the sound radiation in the presence of the vehicle can be approximated reasonably well with simple line source formulae.
Text
The influence of the vehicle body on the sound radiation from the rail
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Published date: December 2022
Venue - Dates:
14th International Workshop on Railway Noise, Shanghai, China, , Shanghai, China, 2022-12-07 - 2022-12-09
Keywords:
rolling noise, sound radiation, reflections, boundary element
Identifiers
Local EPrints ID: 477024
URI: http://eprints.soton.ac.uk/id/eprint/477024
PURE UUID: e1509712-8edc-470e-803c-4bbdd42b83ef
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Date deposited: 23 May 2023 16:52
Last modified: 21 Nov 2024 02:45
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Contributors
Author:
Dong Zhao
Author:
Ester Cierco
Author:
Erwin Jansen
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