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Vibration properties of slab track installed on a viaduct

Vibration properties of slab track installed on a viaduct
Vibration properties of slab track installed on a viaduct
A model of the vibration behaviour of a discontinuous slab track installed on a viaduct is presented. It is represented by a three-layer Euler–Bernoulli beam model subjected to a harmonic load. Analytical equations are derived using the receptance method, and they are used to determine the vibration properties of the system. Comparisons are made between the vibration behaviour under various parameter conditions of the Chinese CRTS I slab track and a typical floating slab track installed on a viaduct. Attention is focused on the mobility, vibration isolation and track decay rates. The results show that, as expected, the floating slab track generates significantly lower viaduct vibrations than the CRTS I slab track. A slab track fitted with a relatively stiff rail pad and soft bearing layer is recommended for consideration during the engineering design phase; appropriate choices can lead to the optimization of the vibration isolation performance of a railway track on a viaduct, thus avoiding the creation of excessive rail vibrations. It is also shown that the average response of the viaduct gives a more representative assessment of the vibration isolation effect than if the average force transmitted to the viaduct is used. Moreover, in terms of insertion loss, these results are relatively insensitive to the choice of viaduct parameters.
Slab track, viaduct, vibration, receptance method
0954-4097
954409714533790
Dai, Feng
8af26855-3c3f-4e28-89b2-17f6216bcfba
Thompson, David J
bca37fd3-d692-4779-b663-5916b01edae5
Zhu, Ying
e5ac9883-7919-4f12-8dd0-8e1d742b7da2
Liu, Xueyi
7ce6142e-8b1f-48f3-b918-4a86529db936
Dai, Feng
8af26855-3c3f-4e28-89b2-17f6216bcfba
Thompson, David J
bca37fd3-d692-4779-b663-5916b01edae5
Zhu, Ying
e5ac9883-7919-4f12-8dd0-8e1d742b7da2
Liu, Xueyi
7ce6142e-8b1f-48f3-b918-4a86529db936

Dai, Feng, Thompson, David J, Zhu, Ying and Liu, Xueyi (2014) Vibration properties of slab track installed on a viaduct. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 954409714533790. (doi:10.1177/0954409714533790).

Record type: Article

Abstract

A model of the vibration behaviour of a discontinuous slab track installed on a viaduct is presented. It is represented by a three-layer Euler–Bernoulli beam model subjected to a harmonic load. Analytical equations are derived using the receptance method, and they are used to determine the vibration properties of the system. Comparisons are made between the vibration behaviour under various parameter conditions of the Chinese CRTS I slab track and a typical floating slab track installed on a viaduct. Attention is focused on the mobility, vibration isolation and track decay rates. The results show that, as expected, the floating slab track generates significantly lower viaduct vibrations than the CRTS I slab track. A slab track fitted with a relatively stiff rail pad and soft bearing layer is recommended for consideration during the engineering design phase; appropriate choices can lead to the optimization of the vibration isolation performance of a railway track on a viaduct, thus avoiding the creation of excessive rail vibrations. It is also shown that the average response of the viaduct gives a more representative assessment of the vibration isolation effect than if the average force transmitted to the viaduct is used. Moreover, in terms of insertion loss, these results are relatively insensitive to the choice of viaduct parameters.

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More information

Accepted/In Press date: 4 April 2014
Published date: 2014
Keywords: Slab track, viaduct, vibration, receptance method
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 381759
URI: https://eprints.soton.ac.uk/id/eprint/381759
ISSN: 0954-4097
PURE UUID: d4d245d1-a5c8-458f-a6c2-6d3072766e3f
ORCID for David J Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 13 Oct 2015 14:32
Last modified: 15 Oct 2019 00:52

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