Publicación: On the nonlinear hunting stability of a high-speed train bogie
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Fecha
2023-02
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info:eu-repo/semantics/openAccess
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Springer
Resumen
The hunting phenomenon is an intrinsic swaying motion appearing in railway vehicles due to the vehicle’s forward speed and the wheel–rail contact forces. Hunting motion consists of wheelset and other vehicle’s components oscillations that arise above a certain vehicle’s speed known as critical or hunting speed. These oscillations are of unstable nature and represent a safety hazard as they could lead to the vehicle’s derailment. This article analyses the stability of a bogie nonlinear model for a Spanish high-speed train when this is travelling at speeds near the hunting speed. The vehicle’s stability is studied by means of root loci methods, and the value of the critical speed is found. In addition to this, the behaviour of the vehicle is studied in both stable and unstable regions and the existence of limit cycles is discussed in this work. Finally, a sensitivity analysis of the axle load and suspension parameters is performed. The results show that the axle load, the vertical stiffness of the primary suspension and the lateral damping of the secondary suspension have a significant influence on the value of the critical speed.
Descripción
The registered version of this article, first published in Nonlinear Dynamics, is available online at the publisher's website: Springer,https://doi.org/10.1007/s11071-022-07937-y
Categorías UNESCO
Palabras clave
nonlinear system, high-speed train, vehicle stability dynamics, numerical simulation
Citación
Bustos, A., Tomas-Rodriguez, M., Rubio, H. et al. On the nonlinear hunting stability of a high-speed train bogie. Nonlinear Dyn 111, 2059–2078 (2023). https://doi.org/10.1007/s11071-022-07937-y
Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica
Grupo de investigación
Mecánica y vibraciones en Máquinas (MAQLAB-UNED)
Grupo de innovación
Grupo de Innovación Docente en Ingeniería Mecánica y de Fluidos (GID-IMF)