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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
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
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.

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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
ORCID for Dong Zhao: ORCID iD orcid.org/0000-0002-1380-9306
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906
ORCID for Evangelos Ntotsios: ORCID iD orcid.org/0000-0001-7382-0948

Catalogue record

Date deposited: 23 May 2023 16:52
Last modified: 28 Mar 2024 03:01

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Contributors

Author: Dong Zhao ORCID iD
Author: David Thompson ORCID iD
Author: Ester Cierco
Author: Erwin Jansen

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