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Analysis of dynamic stiffness effect of primary suspension helical springs on railway vehicle vibration

Analysis of dynamic stiffness effect of primary suspension helical springs on railway vehicle vibration
Analysis of dynamic stiffness effect of primary suspension helical springs on railway vehicle vibration
Helical springs within the primary suspension are critical components for isolating the whole vehicle system from vibration generated at the wheel/rail contact. As train speeds increase, the frequency region of excitation becomes larger, and a simplified static stiffness can no longer represent the real stiffness property in a vehicle dynamic model. Coil springs in particular exhibit strong internal resonances, which lead to high vibration amplitudes within the spring itself as well as degradation of the vibration isolation. In this paper, the dynamic stiffness matrix method is used to determine the dynamic stiffness of a helical spring from a vehicle primary suspension. Results are confirmed with a finite element analysis. Then the spring dynamic stiffness is included within a vehicle-track coupled dynamic model of a high speed train and the effect of the dynamic stiffening of the spring on the vehicle vibration is investigated. It is shown that, for frequencies above about 50 Hz, the dynamic stiffness of the helical spring changes sharply. Due to this effect, the vibration transmissibility increases considerably which results in poor vibration isolation of the primary suspension. Introducing a rubber layer in series with the coil spring can attenuate this effect.
1742-6588
Sun, Wenjing
697ae912-77f1-43f4-b7ee-38cf7fb986b2
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289
Sun, Wenjing
697ae912-77f1-43f4-b7ee-38cf7fb986b2
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289

Sun, Wenjing, Thompson, David, Zhou, Jinsong and Gong, Dao (2016) Analysis of dynamic stiffness effect of primary suspension helical springs on railway vehicle vibration. Journal of Physics: Conference Series, 744, [012149]. (doi:10.1088/1742-6596/744/1/012149).

Record type: Article

Abstract

Helical springs within the primary suspension are critical components for isolating the whole vehicle system from vibration generated at the wheel/rail contact. As train speeds increase, the frequency region of excitation becomes larger, and a simplified static stiffness can no longer represent the real stiffness property in a vehicle dynamic model. Coil springs in particular exhibit strong internal resonances, which lead to high vibration amplitudes within the spring itself as well as degradation of the vibration isolation. In this paper, the dynamic stiffness matrix method is used to determine the dynamic stiffness of a helical spring from a vehicle primary suspension. Results are confirmed with a finite element analysis. Then the spring dynamic stiffness is included within a vehicle-track coupled dynamic model of a high speed train and the effect of the dynamic stiffening of the spring on the vehicle vibration is investigated. It is shown that, for frequencies above about 50 Hz, the dynamic stiffness of the helical spring changes sharply. Due to this effect, the vibration transmissibility increases considerably which results in poor vibration isolation of the primary suspension. Introducing a rubber layer in series with the coil spring can attenuate this effect.

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More information

Accepted/In Press date: 12 August 2016
e-pub ahead of print date: 1 September 2016
Published date: 2016
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 399626
URI: http://eprints.soton.ac.uk/id/eprint/399626
ISSN: 1742-6588
PURE UUID: e0bbc725-cb5d-44e4-918b-72ec0aa2970e
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906

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Date deposited: 22 Aug 2016 12:47
Last modified: 13 Jul 2024 04:01

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Contributors

Author: Wenjing Sun
Author: David Thompson ORCID iD
Author: Jinsong Zhou
Author: Dao Gong

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