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The effect of temperature on railway rolling noise

The effect of temperature on railway rolling noise
The effect of temperature on railway rolling noise
The stiffness and damping of railpads in a railway track are affected by changes in the temperature of the surrounding environment. This results in the rolling noise radiated by trains increasing as the temperature increases. This paper quantifies this effect for a ballasted track equipped with natural rubber railpads and also studies the behaviour of a cork-reinforced rubber railpad. By means of measurements in a temperature-controlled environment, it is shown that the shear modulus of the natural rubber increases by a factor of six when the temperature is reduced from 40 ℃ to −20 ℃. The loss factor increases from 0.15 at 40 ℃ to 0.65 at −20 ℃. The shear modulus of the cork-reinforced rubber increases by a factor of 10, and the loss factor shows the typical trend of transition between rubbery and glassy regions. The railpad stiffness estimated from decay rate measurements at different temperatures is shown to follow the same trend. Field measurements of the noise from passing trains are performed for temperatures between 0 ℃ and 35 ℃; they show an increase of about 3–4 dB. Similar results are obtained from predictions of noise using the measured dependence of pad stiffness.
0954-4097
1-32
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Toward, Martin
1d10e993-e6ef-449d-bccb-1f8198169bee
Cottrell, Rebecca
fc78336e-6b2e-4242-b5f4-4defd3522c32
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Toward, Martin
1d10e993-e6ef-449d-bccb-1f8198169bee
Cottrell, Rebecca
fc78336e-6b2e-4242-b5f4-4defd3522c32

Squicciarini, Giacomo, Thompson, David, Toward, Martin and Cottrell, Rebecca (2015) The effect of temperature on railway rolling noise. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 230 (8), 1-32. (doi:10.1177/0954409715614337).

Record type: Article

Abstract

The stiffness and damping of railpads in a railway track are affected by changes in the temperature of the surrounding environment. This results in the rolling noise radiated by trains increasing as the temperature increases. This paper quantifies this effect for a ballasted track equipped with natural rubber railpads and also studies the behaviour of a cork-reinforced rubber railpad. By means of measurements in a temperature-controlled environment, it is shown that the shear modulus of the natural rubber increases by a factor of six when the temperature is reduced from 40 ℃ to −20 ℃. The loss factor increases from 0.15 at 40 ℃ to 0.65 at −20 ℃. The shear modulus of the cork-reinforced rubber increases by a factor of 10, and the loss factor shows the typical trend of transition between rubbery and glassy regions. The railpad stiffness estimated from decay rate measurements at different temperatures is shown to follow the same trend. Field measurements of the noise from passing trains are performed for temperatures between 0 ℃ and 35 ℃; they show an increase of about 3–4 dB. Similar results are obtained from predictions of noise using the measured dependence of pad stiffness.

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Accepted/In Press date: 7 October 2015
e-pub ahead of print date: 1 November 2015
Published date: 2015
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 383568
URI: http://eprints.soton.ac.uk/id/eprint/383568
ISSN: 0954-4097
PURE UUID: d4af8419-a7eb-4761-a0dd-cd68b81b6db6
ORCID for Giacomo Squicciarini: ORCID iD orcid.org/0000-0003-2437-6398
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906
ORCID for Martin Toward: ORCID iD orcid.org/0000-0001-7334-4355

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Date deposited: 23 Nov 2015 12:38
Last modified: 15 Mar 2024 03:41

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Contributors

Author: David Thompson ORCID iD
Author: Martin Toward ORCID iD
Author: Rebecca Cottrell

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