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基于数值模型和解析模型的钢轨波导特性分析

基于数值模型和解析模型的钢轨波导特性分析
基于数值模型和解析模型的钢轨波导特性分析

The vibration of rails is a major contributor to railway rolling noise, and consists of different guided waves that propagate along the rail. To study the dynamic behaviour of a railway track, models based on the Timoshenko beam theory and the waveguide finite-element method were established. The solution procedures to obtain the free wave response and the forced response for each model were determined. The characteristics of guided waves in rails, such as wavenumber, group velocity, mobility, and decay rate, were analysed based on two different models. The waveguide finite-element model, which includes all the features of rail cross-section deformation, makes it possible to identify eight kinds of guided waves in rails within a frequency range of as much as 6 kHz. Moreover, the phenomena of wave mode exchange and group velocity exchange between waves are discussed, as well as the peak in the mobility caused by the excitation of the higher-order wave mode. The Timoshenko beam model can identify five of these wave modes, including those for bending, torsion, and extensional waves, but it cannot identify the ones associated with cross-section deformations that cut on at frequencies of more than 1.5 kHz. The Timoshenko beam model provides acceptable results for point mobilities of as much as 2 kHz.

Group velocity, Mobility, Railway track, Timoshenko beam, Waveguide finite element
0258-2724
951-957
Dai, Feng
9113ff72-8aa2-467b-985d-a09346e9c9ec
Liu, Xueyi
7ce6142e-8b1f-48f3-b918-4a86529db936
Zhu, Ying
e5ac9883-7919-4f12-8dd0-8e1d742b7da2
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Yang, Jizhong
64f12adb-ce4c-4633-936a-edf2df7bcee2
Dai, Feng
9113ff72-8aa2-467b-985d-a09346e9c9ec
Liu, Xueyi
7ce6142e-8b1f-48f3-b918-4a86529db936
Zhu, Ying
e5ac9883-7919-4f12-8dd0-8e1d742b7da2
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Yang, Jizhong
64f12adb-ce4c-4633-936a-edf2df7bcee2

Dai, Feng, Liu, Xueyi, Zhu, Ying, Thompson, David and Yang, Jizhong (2018) 基于数值模型和解析模型的钢轨波导特性分析. Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University, 53 (5), 951-957. (doi:10.3969/j.issn.0258-2724.2018.05.011).

Record type: Article

Abstract

The vibration of rails is a major contributor to railway rolling noise, and consists of different guided waves that propagate along the rail. To study the dynamic behaviour of a railway track, models based on the Timoshenko beam theory and the waveguide finite-element method were established. The solution procedures to obtain the free wave response and the forced response for each model were determined. The characteristics of guided waves in rails, such as wavenumber, group velocity, mobility, and decay rate, were analysed based on two different models. The waveguide finite-element model, which includes all the features of rail cross-section deformation, makes it possible to identify eight kinds of guided waves in rails within a frequency range of as much as 6 kHz. Moreover, the phenomena of wave mode exchange and group velocity exchange between waves are discussed, as well as the peak in the mobility caused by the excitation of the higher-order wave mode. The Timoshenko beam model can identify five of these wave modes, including those for bending, torsion, and extensional waves, but it cannot identify the ones associated with cross-section deformations that cut on at frequencies of more than 1.5 kHz. The Timoshenko beam model provides acceptable results for point mobilities of as much as 2 kHz.

Full text not available from this repository.

More information

Published date: 1 October 2018
Alternative titles: Analysis of guided wave behaviour in rails using numerical or analytical models
Keywords: Group velocity, Mobility, Railway track, Timoshenko beam, Waveguide finite element

Identifiers

Local EPrints ID: 428773
URI: http://eprints.soton.ac.uk/id/eprint/428773
ISSN: 0258-2724
PURE UUID: 4eef9bb2-dd24-46fe-85e1-2fd007263ce1
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 08 Mar 2019 17:30
Last modified: 18 Feb 2021 16:47

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