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Vertical random vibration analysis of vehicle--track coupled system using Green's function method

Vertical random vibration analysis of vehicle--track coupled system using Green's function method
Vertical random vibration analysis of vehicle--track coupled system using Green's function method
A vertical vehicle–track coupled dynamic model, consisting of a high-speed train on a continuously supported rail, is established in the frequency-domain. The solution is obtained efficiently by use of the Green's function method, which can determine the vibration response over a wide range of frequency without any limitations due to modal truncation. Moreover, real track irregularity spectra can be used conveniently as input. The effect of the flexibility of both track and car body on the entire vehicle–track coupled dynamic response is investigated. A multi-body model of a vehicle with either rigid or flexible car body is defined running on three kinds of track: a rigid rail, a track stiffness model and a Timoshenko beam model. The results show that neglecting the track flexibility leads to an overestimation of both the contact force and the whole vehicle vibration response. The car body flexibility affects the ride quality of the vehicle and the coupling through the track and can be significant in certain frequency ranges. Finally, the effect of railpad and ballast stiffness on the vehicle–track coupled vibration is analysed, indicating that the stiffness of the railpad has an influence on the system in a higher frequency range than the ballast.
0042-3114
362-389
Sun, Wenjing
02a2e04b-ae6a-4d11-b3ff-8c7f83e2eb11
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289
Sun, Wenjing
02a2e04b-ae6a-4d11-b3ff-8c7f83e2eb11
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289

Sun, Wenjing, Zhou, Jinsong, Thompson, David and Gong, Dao (2014) Vertical random vibration analysis of vehicle--track coupled system using Green's function method. Vehicle System Dynamics, 52 (3), 362-389. (doi:10.1080/00423114.2014.884227).

Record type: Article

Abstract

A vertical vehicle–track coupled dynamic model, consisting of a high-speed train on a continuously supported rail, is established in the frequency-domain. The solution is obtained efficiently by use of the Green's function method, which can determine the vibration response over a wide range of frequency without any limitations due to modal truncation. Moreover, real track irregularity spectra can be used conveniently as input. The effect of the flexibility of both track and car body on the entire vehicle–track coupled dynamic response is investigated. A multi-body model of a vehicle with either rigid or flexible car body is defined running on three kinds of track: a rigid rail, a track stiffness model and a Timoshenko beam model. The results show that neglecting the track flexibility leads to an overestimation of both the contact force and the whole vehicle vibration response. The car body flexibility affects the ride quality of the vehicle and the coupling through the track and can be significant in certain frequency ranges. Finally, the effect of railpad and ballast stiffness on the vehicle–track coupled vibration is analysed, indicating that the stiffness of the railpad has an influence on the system in a higher frequency range than the ballast.

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More information

Accepted/In Press date: 10 January 2014
e-pub ahead of print date: 11 February 2014
Published date: 2014
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 381753
URI: https://eprints.soton.ac.uk/id/eprint/381753
ISSN: 0042-3114
PURE UUID: 46270dff-98bd-4af4-97db-0fec8a24220c
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 13 Oct 2015 14:16
Last modified: 22 Oct 2019 00:52

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