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Development and application of theoretical models for high frequency vibration of railway track

Development and application of theoretical models for high frequency vibration of railway track
Development and application of theoretical models for high frequency vibration of railway track

Railway track vibration caused by the rolling of the wheel on the rail is a significant source of noise. A theoretical study of track dynamics is carried out by developing new rail models and investigating the effects on track vibration of various factors which might arise in practice.

New analytical models for high frequency rail vibration are developed and both vertical and lateral vibrations are studied using these models. Comparisons with FE models and measurement data are made to validate the newly developed models.

The non-linearity of the track foundation is taken into account in the track model in accordance with the static loads in the track foundation caused by the train weight. Their influences on track vibration are explored.

The concept of the random sleeper spacing and ballast stififiess is introduced into the track model because both are found to be irregular in practice even for a newly built railway track. The influence on track vibration of random sleeper spacing and ballast stiffhess is investigated from a statistical point of view.

The effects on track vibration of multiple wheel/rail interactions are studied. Predictions are made for track vibration and noise radiation by taking account of both original and passive wheel/rail interactions, which are caused by roughnesses and rail vibration respectively, and the non-linearity of the track foundation. Results from different models are compared and discussed in terms of the receptance of the track vibration, wheel/rail excitation and noise radiation.

This study shows that when a train runs on a track, both the wheel static load and the presence of wheels on the rail affect the track vibration.

University of Southampton
Wu, Tianxing
Wu, Tianxing

Wu, Tianxing (2000) Development and application of theoretical models for high frequency vibration of railway track. University of Southampton, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

Railway track vibration caused by the rolling of the wheel on the rail is a significant source of noise. A theoretical study of track dynamics is carried out by developing new rail models and investigating the effects on track vibration of various factors which might arise in practice.

New analytical models for high frequency rail vibration are developed and both vertical and lateral vibrations are studied using these models. Comparisons with FE models and measurement data are made to validate the newly developed models.

The non-linearity of the track foundation is taken into account in the track model in accordance with the static loads in the track foundation caused by the train weight. Their influences on track vibration are explored.

The concept of the random sleeper spacing and ballast stififiess is introduced into the track model because both are found to be irregular in practice even for a newly built railway track. The influence on track vibration of random sleeper spacing and ballast stiffhess is investigated from a statistical point of view.

The effects on track vibration of multiple wheel/rail interactions are studied. Predictions are made for track vibration and noise radiation by taking account of both original and passive wheel/rail interactions, which are caused by roughnesses and rail vibration respectively, and the non-linearity of the track foundation. Results from different models are compared and discussed in terms of the receptance of the track vibration, wheel/rail excitation and noise radiation.

This study shows that when a train runs on a track, both the wheel static load and the presence of wheels on the rail affect the track vibration.

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Published date: 2000

Identifiers

Local EPrints ID: 466984
URI: http://eprints.soton.ac.uk/id/eprint/466984
PURE UUID: 5318efd6-e3ae-4ef2-acd6-06866c1dfa07

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Date deposited: 05 Jul 2022 08:06
Last modified: 05 Jul 2022 08:06

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Contributors

Author: Tianxing Wu

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