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Influence of rail fastener stiffness on railway vehicle interior noise

Influence of rail fastener stiffness on railway vehicle interior noise
Influence of rail fastener stiffness on railway vehicle interior noise
More attention has been paid in recent years to the interior noise of railway vehicles. It has been observed that the interior noise can increase in some locations where vibration-isolation measures are used in the track structures. In order to assess the influence of vibration isolation measures on the noise levels inside railway vehicles, a field measurement campaign has been carried out. The vehicle interior noise has been measured when a train is running at different speeds over the same non-ballasted track section fitted with two types of rail fastener of different stiffnesses. Additional measurements of axlebox vibration, train floor vibration, exterior noise and rail vibration are used to investigate the influence of the fasteners further. The experimental results are compared with simulations performed using the TWINS model, considering the wheel/rail interaction, by focusing only on the relative differences between the two fastener systems. The axlebox vibration and rail vibration are predicted for a unit roughness input and the differences in rolling noise are also obtained. The predicted differences in axlebox vibration, rail vibration and rolling noise are in broad agreement with the measurement results. The results show that the fasteners with a lower stiffness cause a noisier interior environment. Around 125 Hz and in the frequency range 315–1000 Hz, the noise levels are higher for the more elastic fastener, with an average level difference of 3 dB in the latter frequency range. It appears from the shape of the level difference spectra that airborne noise has most influence between 100 and 400 Hz and structure-borne noise has more influence between 500 and 1000 Hz.
0003-682X
69-81
Li, Li
8e6fbabd-aac6-4bb0-a273-a77750dc5b92
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Xie, Yingsong
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Zhu, Qian
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Luo, Yanyun
ae9e41a3-5c3b-4727-9b84-c00c473a034d
Lei, Zhenyu
37903788-8295-49e4-8ba3-d75c28a8a6d4
Li, Li
8e6fbabd-aac6-4bb0-a273-a77750dc5b92
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Xie, Yingsong
b954fd8e-7755-4fb2-b429-1ea0397256d6
Zhu, Qian
75dff558-b254-4b21-9185-060dcc727c9a
Luo, Yanyun
ae9e41a3-5c3b-4727-9b84-c00c473a034d
Lei, Zhenyu
37903788-8295-49e4-8ba3-d75c28a8a6d4

Li, Li, Thompson, David, Xie, Yingsong, Zhu, Qian, Luo, Yanyun and Lei, Zhenyu (2019) Influence of rail fastener stiffness on railway vehicle interior noise. Applied Acoustics, 145, 69-81. (doi:10.1016/j.apacoust.2018.09.006).

Record type: Article

Abstract

More attention has been paid in recent years to the interior noise of railway vehicles. It has been observed that the interior noise can increase in some locations where vibration-isolation measures are used in the track structures. In order to assess the influence of vibration isolation measures on the noise levels inside railway vehicles, a field measurement campaign has been carried out. The vehicle interior noise has been measured when a train is running at different speeds over the same non-ballasted track section fitted with two types of rail fastener of different stiffnesses. Additional measurements of axlebox vibration, train floor vibration, exterior noise and rail vibration are used to investigate the influence of the fasteners further. The experimental results are compared with simulations performed using the TWINS model, considering the wheel/rail interaction, by focusing only on the relative differences between the two fastener systems. The axlebox vibration and rail vibration are predicted for a unit roughness input and the differences in rolling noise are also obtained. The predicted differences in axlebox vibration, rail vibration and rolling noise are in broad agreement with the measurement results. The results show that the fasteners with a lower stiffness cause a noisier interior environment. Around 125 Hz and in the frequency range 315–1000 Hz, the noise levels are higher for the more elastic fastener, with an average level difference of 3 dB in the latter frequency range. It appears from the shape of the level difference spectra that airborne noise has most influence between 100 and 400 Hz and structure-borne noise has more influence between 500 and 1000 Hz.

Text
Influence of rail fastener stiffness on railway vehicle interior noise (accepted version) - Accepted Manuscript
Restricted to Repository staff only until 4 October 2019.
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More information

Accepted/In Press date: 11 September 2018
e-pub ahead of print date: 4 October 2018
Published date: February 2019

Identifiers

Local EPrints ID: 423521
URI: https://eprints.soton.ac.uk/id/eprint/423521
ISSN: 0003-682X
PURE UUID: c23f112d-d265-4994-9231-faff4acb9502
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906

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Date deposited: 25 Sep 2018 16:30
Last modified: 15 Jul 2019 16:59

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