Computational Technology Resources - CCC

Z. Dimitrovova^1,2

¹Institute of Mechanical Engineering, Instituto Superior Técnico, Lisboa, Portugal
²Department of Civil Engineering, Nova School of Science and Technology, NOVA FCT, Caparica, Portugal

Z. Dimitrovova, "Adjusting the Parameters of the Three-Layer Track Model to Suppress the Negative Influence of the Critical Velocity", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 2.1, 2025,

Keywords: three-layer model, integral transforms, semianalytical methods, critical velocity, moving loads, onset of instability.

Abstract

This paper gives indications for the rail track design in order to allow train circulation at high speeds. This is demonstrated on a three-layer model of the railway track. This model should exhibit three critical velocities for resonance, however, very often the lowest value is replaced by the so-called pseudocritical velocity. The aim of this paper is therefore to tailor the geometry and material parameters of this model to provide properties leading to a significant reduction of the influence of the pseudocritical velocity so that only a slight increase in vibrations is detected. It is then possible to extend the range of traffic speeds to very high values without compromising the circulation safety. This is very important for the current trends of increasing the speed and capacity of the railway network.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 10 PROCEEDINGS OF THE EIGHTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 2.1 Adjusting the Parameters of the Three-Layer Track Model to Suppress the Negative Influence of the Critical Velocity Z. Dimitrovova^1,2 ¹Institute of Mechanical Engineering, Instituto Superior Técnico, Lisboa, Portugal ²Department of Civil Engineering, Nova School of Science and Technology, NOVA FCT, Caparica, Portugal Full Bibliographic Reference for this paper Z. Dimitrovova, "Adjusting the Parameters of the Three-Layer Track Model to Suppress the Negative Influence of the Critical Velocity", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 2.1, 2025, Keywords: three-layer model, integral transforms, semianalytical methods, critical velocity, moving loads, onset of instability. Abstract This paper gives indications for the rail track design in order to allow train circulation at high speeds. This is demonstrated on a three-layer model of the railway track. This model should exhibit three critical velocities for resonance, however, very often the lowest value is replaced by the so-called pseudocritical velocity. The aim of this paper is therefore to tailor the geometry and material parameters of this model to provide properties leading to a significant reduction of the influence of the pseudocritical velocity so that only a slight increase in vibrations is detected. It is then possible to extend the range of traffic speeds to very high values without compromising the circulation safety. This is very important for the current trends of increasing the speed and capacity of the railway network. download the full-text of this paper (PDF, 10 pages, 564 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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