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Sound radiation from a vibrating railway wheel

Sound radiation from a vibrating railway wheel
Sound radiation from a vibrating railway wheel
The sound radiation characteristics of a railway wheel are investigated by using boundary element calculations. The axisymmetry of the wheel allows an axi-harmonic formulation to be used, in which the wheel is defined by a two-dimensional mesh of its cross-section and the motion is decomposed into harmonics of different numbers of nodal diameters. The radiation ratios of the wheel, vibrating in its various normal modes, are calculated for a range of frequencies. The effects of variation in the wheel radius, web thickness and tyre depth are also investigated. From these results, simple formulae are proposed that allow the radiation ratios to be approximated closely. These are more convenient than the boundary element calculations for calculating the rolling noise from a wheel since they are a function of a few simple geometrical parameters. The directivity of wheel radiation is also considered, with comparisons with measured data indicating that simple monopole and dipole characteristics can be applied.
0022-460X
401-419
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Jones, C.J.C.
695ac86c-2915-420c-ac72-3a86f98d3301
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Jones, C.J.C.
695ac86c-2915-420c-ac72-3a86f98d3301

Thompson, D.J. and Jones, C.J.C. (2002) Sound radiation from a vibrating railway wheel. Journal of Sound and Vibration, 253 (2), 401-419. (doi:10.1006/jsvi.2001.4061).

Record type: Article

Abstract

The sound radiation characteristics of a railway wheel are investigated by using boundary element calculations. The axisymmetry of the wheel allows an axi-harmonic formulation to be used, in which the wheel is defined by a two-dimensional mesh of its cross-section and the motion is decomposed into harmonics of different numbers of nodal diameters. The radiation ratios of the wheel, vibrating in its various normal modes, are calculated for a range of frequencies. The effects of variation in the wheel radius, web thickness and tyre depth are also investigated. From these results, simple formulae are proposed that allow the radiation ratios to be approximated closely. These are more convenient than the boundary element calculations for calculating the rolling noise from a wheel since they are a function of a few simple geometrical parameters. The directivity of wheel radiation is also considered, with comparisons with measured data indicating that simple monopole and dipole characteristics can be applied.

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Published date: 2002

Identifiers

Local EPrints ID: 10065
URI: http://eprints.soton.ac.uk/id/eprint/10065
ISSN: 0022-460X
PURE UUID: e7ee5269-3d25-4077-b576-006a2d9d9a0d
ORCID for D.J. Thompson: ORCID iD orcid.org/0000-0002-7964-5906

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Date deposited: 22 Sep 2005
Last modified: 29 Oct 2019 02:03

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Contributors

Author: D.J. Thompson ORCID iD
Author: C.J.C. Jones

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