Kouroussis, G, Connolly, DP, Alexandrou, G et al. (1 more author) (2015) Railway ground vibrations induced by wheel and rail singular defects. Vehicle System Dynamics, 53 (10). pp. 1500-1519. ISSN 0042-3114
Abstract
Railway local irregularities are a growing source of ground-borne vibration and can cause negative environmental impacts, particularly in urban areas. Therefore, this paper analyses the effect of railway track singular defects (discontinuities) on ground vibration generation and propagation. A vehicle/track/soil numerical railway model is presented, capable of accurately predicting vibration levels. The prediction model is composed of a multibody vehicle model, a flexible track model and a finite/infinite element soil model. Firstly, analysis is undertaken to assess the ability of wheel/rail contact models to accurately simulate the force generation at the wheel/rail contact, in the presence of a singular defect. It is found that, although linear contact models are sufficient for modelling ground vibration on smooth tracks, when singular defects are present higher accuracy wheel/rail models are required. Furthermore, it is found that the variation in wheel/rail force during the singular defect contact depends on the track flexibility, and thus requires a fully coupled vehicle/track/foundation model. Next, a parametric study of ground vibrations generated by singular rail and wheel defects is undertaken. Six shapes of discontinuity are modelled, representing various defect types such as transition zones, switches, crossings, rail joints and wheel flats. The vehicle is modelled as an AM96 train set and it is found that ground vibration levels are highly sensitive to defect height, length and shape.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | railway, vehicle/track coupling system, wheel flat, singular track irregularities, Hertziancontact, switches, ground-borne vibration, transition zone, rail joint |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Mar 2018 16:42 |
Last Modified: | 23 Mar 2018 16:42 |
Status: | Published |
Publisher: | Taylor & Francis |
Identification Number: | 10.1080/00423114.2015.1062116 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:126606 |