Computational Technology Resources - CCC

Keywords: virtual tests, running dynamics, hydraulic bushings, vehicle performance.

Abstract

Acceptable running characteristics of a railway vehicle are essential for a safe and economic operation of a railway system. The assessment of running characteristics applies not only to newly developed vehicles but also to vehicles which have had relevant design modifications. The work presented in this paper concerns the use of virtual tests to assess running characteristics of a modified regional train. The method employed is based on the European standard EN14363:2018. The aim of this work is to prove quickly the advantages of using a new innovative hydraulic bushing of primary suspension to replace the original bushing for an existing regional train in France. To achieve our objective, 3 main tasks are performed. Firstly, a numerical model is built and validated based on the annex T of the standard EN14363:2018, using initial on-track measurements. Then, this validated model is used during the design phase to obtain a set of optimal characteristics for the hydraulic bushing. Those data are proposed to our supplier for the manufacture. Finally, the model is used again to simulate the running behaviour of the train equipped with real characteristics of hydraulic bushings on different types of track (tangent and curved tracks). This work proves a good level of safety with a potential reduction of 40% of wear and energy consumption in certain curves of the train equipped with hydraulic bushings. Thank to our study, 30 new innovative hydraulic bushings are manufactured and installed in 3 commercial trains in 2022 for at least two years of test. A regular monitoring of wear of the wheel will be carried out. It is expected to observe a reduction of the Life-Cycle Costs (LCC). If this is confirmed by test, the whole fleet of this type of train could be equipped with these hydraulic bushings.

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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: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 31.10 Optimisation of railway vehicle performance using virtual tests in running dynamics S.H. Mai, F. Desgaches, E. Pourret, L. Foucher and C. Rizzo SNCF Voyageurs, Centre d’Ingénierie du Matériel, Le Mans, France doi:10.4203/ccc.1.31.10 Full Bibliographic Reference for this paper S.H. Mai, F. Desgaches, E. Pourret, L. Foucher, C. Rizzo, "Optimisation of railway vehicle performance using virtual tests in running dynamics", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 31.10, 2022, doi:10.4203/ccc.1.31.10 Keywords: virtual tests, running dynamics, hydraulic bushings, vehicle performance. Abstract Acceptable running characteristics of a railway vehicle are essential for a safe and economic operation of a railway system. The assessment of running characteristics applies not only to newly developed vehicles but also to vehicles which have had relevant design modifications. The work presented in this paper concerns the use of virtual tests to assess running characteristics of a modified regional train. The method employed is based on the European standard EN14363:2018. The aim of this work is to prove quickly the advantages of using a new innovative hydraulic bushing of primary suspension to replace the original bushing for an existing regional train in France. To achieve our objective, 3 main tasks are performed. Firstly, a numerical model is built and validated based on the annex T of the standard EN14363:2018, using initial on-track measurements. Then, this validated model is used during the design phase to obtain a set of optimal characteristics for the hydraulic bushing. Those data are proposed to our supplier for the manufacture. Finally, the model is used again to simulate the running behaviour of the train equipped with real characteristics of hydraulic bushings on different types of track (tangent and curved tracks). This work proves a good level of safety with a potential reduction of 40% of wear and energy consumption in certain curves of the train equipped with hydraulic bushings. Thank to our study, 30 new innovative hydraulic bushings are manufactured and installed in 3 commercial trains in 2022 for at least two years of test. A regular monitoring of wear of the wheel will be carried out. It is expected to observe a reduction of the Life-Cycle Costs (LCC). If this is confirmed by test, the whole fleet of this type of train could be equipped with these hydraulic bushings. download the full-text of this paper (PDF, 118 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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