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G. Alexandrou, G. Kouroussis, O. Verlinden, "Modelling the Effect of Wheel Flat on Railway-Induced Ground Vibrations", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 216, 2014. doi:10.4203/ccp.104.216

Keywords: railway ground vibrations, multibody model, wheel flat, vehicle dynamics, wheel-rail contact, track deflection.

Summary

One of the most important irregularities in low speed trains is a flat on a wheel of the vehicle since it can cause large dynamic impact forces. The first part of this paper aims to investigate the behaviour of the wheel-rail contact when the wheel has a flat irregularity and travels with constant speed. The modelling of wheel-rail interface has been done using a non-linear Hertzian contact. The second part of the study attempts to model the effects of the wheel flat on railways-induced ground vibration by employing a prediction scheme based on a two-step approach. The first subproblem concerns the interaction between the vehicle and the track. Results of the simulation, more specifically the ballast reactions, are used in a second subproblem where the free field ground response is computed using a full 3-D finite/infinite model of soil under the commercial software ABAQUS. Various analyses were conducted for different vehicle speeds and sizes of the wheel flat on the case of T2000 tram in Brussels. Results of the study showed that a small wheel flat can affect significantly the impact forces transferred to the ground even at low speeds.

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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: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 216 Modelling the Effect of Wheel Flat on Railway-Induced Ground Vibrations G. Alexandrou, G. Kouroussis and O. Verlinden Department of Theoretical Mechanics, Dynamics and Vibrations, Faculty of Engineering, Université de Mons (UMONS), Belgium doi:10.4203/ccp.104.216 purchase the full-text of this paper Full Bibliographic Reference for this paper G. Alexandrou, G. Kouroussis, O. Verlinden, "Modelling the Effect of Wheel Flat on Railway-Induced Ground Vibrations", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 216, 2014. doi:10.4203/ccp.104.216 Keywords: railway ground vibrations, multibody model, wheel flat, vehicle dynamics, wheel-rail contact, track deflection. Summary One of the most important irregularities in low speed trains is a flat on a wheel of the vehicle since it can cause large dynamic impact forces. The first part of this paper aims to investigate the behaviour of the wheel-rail contact when the wheel has a flat irregularity and travels with constant speed. The modelling of wheel-rail interface has been done using a non-linear Hertzian contact. The second part of the study attempts to model the effects of the wheel flat on railways-induced ground vibration by employing a prediction scheme based on a two-step approach. The first subproblem concerns the interaction between the vehicle and the track. Results of the simulation, more specifically the ballast reactions, are used in a second subproblem where the free field ground response is computed using a full 3-D finite/infinite model of soil under the commercial software ABAQUS. Various analyses were conducted for different vehicle speeds and sizes of the wheel flat on the case of T2000 tram in Brussels. Results of the study showed that a small wheel flat can affect significantly the impact forces transferred to the ground even at low speeds. purchase the full-text of this paper (price £20) 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 £65 +P&P)
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