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V. Bourgeois, S. Neveu, J. Causse, "Study of Vehicle and Track Dynamic Behaviour due to Short-Wavelength Rail Defects", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 269, 2016. doi:10.4203/ccp.110.269

Keywords: axle-box acceleration, rail defect, vehicle-track dynamics.

Summary

This paper presents a study of the vertical vehicle/track dynamics for a train running over a short rail defect. The effects of the defect typology (ballast pit with bent rail, squat), depth and length on the axle-box vertical accelerations and displacements have been investigated using a parametric study.

The model used to represent vertical movements of the vehicle and the track has been discussed. It showed reliable temporal and frequency results comparing the simulated and in-line measurement of axle boxes vertical accelerations.

Simulations showed a link between the defect shape and the maximal vertical acceleration of the axle box together with the duration that the axle needs to recover its stable state. A first order polynomial highlighted the most influencing track and running condition parameters.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 269 Study of Vehicle and Track Dynamic Behaviour due to Short-Wavelength Rail Defects V. Bourgeois, S. Neveu and J. Causse Lines Track Environment Department, SNCF-Réseau Ingénierie & Projets, La Plaine Saint Denis, France doi:10.4203/ccp.110.269 purchase the full-text of this paper Full Bibliographic Reference for this paper V. Bourgeois, S. Neveu, J. Causse, "Study of Vehicle and Track Dynamic Behaviour due to Short-Wavelength Rail Defects", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 269, 2016. doi:10.4203/ccp.110.269 Keywords: axle-box acceleration, rail defect, vehicle-track dynamics. Summary This paper presents a study of the vertical vehicle/track dynamics for a train running over a short rail defect. The effects of the defect typology (ballast pit with bent rail, squat), depth and length on the axle-box vertical accelerations and displacements have been investigated using a parametric study. The model used to represent vertical movements of the vehicle and the track has been discussed. It showed reliable temporal and frequency results comparing the simulated and in-line measurement of axle boxes vertical accelerations. Simulations showed a link between the defect shape and the maximal vertical acceleration of the axle box together with the duration that the axle needs to recover its stable state. A first order polynomial highlighted the most influencing track and running condition parameters. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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