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Y. Nagumo, Y. Misu, "Evaluation Method of Railway Vehicles’ Resistance Against a Tornado-like Vortex", 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 3.6, 2024, doi:10.4203/ccc.7.3.6

Keywords: gust, crosswind, critical wind speed of overturning, multi-body dynamics, RTRI’s detailed equation, wheel load reduction rate.

Abstract

In this study, the effects of tornado-like vortex parameters on the dynamic responses of a vehicle were evaluated using a dynamic analysis model, and a method for evaluation of the vehicles’ resistance to overturning due to tornadoes was examined. Firstly, the model of wind speed field around a vortex was modified to reproduce all situations where a vehicle encounters a tornado-like vortex, and the dynamic analysis model for aerodynamic forces and vehicle responses was constructed. Secondly, using the constructed dynamic analysis model, the vehicle responses were evaluated by varying the vortex parameters to identify the conditions under which the responses became large. Finally, the dynamic analysis results under the identified conditions were compared with the quasi-static analysis results using the RTRI’s detailed equation which used in the actual train operation. The results derived utilizing the constructed dynamic analysis model under the identified conditions showed that the RTRI’s detailed equation could be used to evaluate vehicles’ resistance to overturning on the safe side.

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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 3.6 Evaluation Method of Railway Vehicles’ Resistance Against a Tornado-like Vortex Y. Nagumo and Y. Misu Research and Development Center of JR East Group, East Japan Railway Company, Tokyo, Japan doi:10.4203/ccc.7.3.6 Full Bibliographic Reference for this paper Y. Nagumo, Y. Misu, "Evaluation Method of Railway Vehicles’ Resistance Against a Tornado-like Vortex", 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 3.6, 2024, doi:10.4203/ccc.7.3.6 Keywords: gust, crosswind, critical wind speed of overturning, multi-body dynamics, RTRI’s detailed equation, wheel load reduction rate. Abstract In this study, the effects of tornado-like vortex parameters on the dynamic responses of a vehicle were evaluated using a dynamic analysis model, and a method for evaluation of the vehicles’ resistance to overturning due to tornadoes was examined. Firstly, the model of wind speed field around a vortex was modified to reproduce all situations where a vehicle encounters a tornado-like vortex, and the dynamic analysis model for aerodynamic forces and vehicle responses was constructed. Secondly, using the constructed dynamic analysis model, the vehicle responses were evaluated by varying the vortex parameters to identify the conditions under which the responses became large. Finally, the dynamic analysis results under the identified conditions were compared with the quasi-static analysis results using the RTRI’s detailed equation which used in the actual train operation. The results derived utilizing the constructed dynamic analysis model under the identified conditions showed that the RTRI’s detailed equation could be used to evaluate vehicles’ resistance to overturning on the safe side. download the full-text of this paper (PDF, 14 pages, 964 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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