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J. Gil Romero, S. Gregori, M. Tur, F.J. Fuenmayor, "The Relevance of Non-Linear Dynamics on Railway Pantographs", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 4.3, 2024, doi:10.4203/ccc.7.4.3

Keywords: pantograph, non-linear, modelling, experimental test, frequency response analysis, pantograph-catenary interaction.

Abstract

The pantograph-catenary dynamic interaction is widely studied by computational simulations, which depend on accurate models to provide faithful results. In this paper, we particularly deal with the modelling of the DSA-380 pantograph. Firstly, experimental tests are conducted to evaluate the dynamic behaviour of the pantograph and the importance of the non-linearities in it. The non-linear behaviour is evidenced if a frequency response function changes when the excitation applied changes. In this work, we identify the nature of the non-linearities and the specific parts where they come from. Then, we create a model able to emulate the dynamics of the real pantograph with a simple but effective design. The model is a lumped mass model with a non-linear system for the pantograph head suspension, which includes geometric non-linearities and dry friction. The model is able to reproduce successfully the frequency response functions of the pantograph even though it is an uncomplicated model in which only the necessary elements are included. Besides the development of the model, this work also proposes an efficient strategy to integrate the dynamic equation with Coulomb friction, showing good performance even with slip/stick transitions.

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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: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 4.3 The Relevance of Non-Linear Dynamics on Railway Pantographs J. Gil Romero, S. Gregori, M. Tur and F.J. Fuenmayor Institute of Mechanical Engineering and Biomechanics, Universitat Politecnica de Valencia, Spain doi:10.4203/ccc.7.4.3 Full Bibliographic Reference for this paper J. Gil Romero, S. Gregori, M. Tur, F.J. Fuenmayor, "The Relevance of Non-Linear Dynamics on Railway Pantographs", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 4.3, 2024, doi:10.4203/ccc.7.4.3 Keywords: pantograph, non-linear, modelling, experimental test, frequency response analysis, pantograph-catenary interaction. Abstract The pantograph-catenary dynamic interaction is widely studied by computational simulations, which depend on accurate models to provide faithful results. In this paper, we particularly deal with the modelling of the DSA-380 pantograph. Firstly, experimental tests are conducted to evaluate the dynamic behaviour of the pantograph and the importance of the non-linearities in it. The non-linear behaviour is evidenced if a frequency response function changes when the excitation applied changes. In this work, we identify the nature of the non-linearities and the specific parts where they come from. Then, we create a model able to emulate the dynamics of the real pantograph with a simple but effective design. The model is a lumped mass model with a non-linear system for the pantograph head suspension, which includes geometric non-linearities and dry friction. The model is able to reproduce successfully the frequency response functions of the pantograph even though it is an uncomplicated model in which only the necessary elements are included. Besides the development of the model, this work also proposes an efficient strategy to integrate the dynamic equation with Coulomb friction, showing good performance even with slip/stick transitions. download the full-text of this paper (PDF, 11 pages, 1085 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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