Dynamic train-track interaction at high vehicle speeds-Modelling of wheelset dynamics and wheel rotation

[EN] Vertical dynamic traintrack interaction at high vehicle speeds is investigated in a frequency range from about 20 Hz to 2.5 kHz. The inertial effects due to wheel rotation are accounted for in the vehicle model by implementing a structural dynamics model of a rotating wheelset. Calculated wheelrail contact forces using the flexible, rotating wheelset model are compared with contact forces based on rigid, non-rotating models. For a validation of the traintrack interaction model, calculated contact forces are compared with contact forces measured using an instrumented wheelset. When the system is excited at a frequency where two different wheelset mode shapes, due to the wheel rotation, have coinciding resonance frequencies, significant differences are found in the contact forces calculated with the rotating and non-rotating wheelset models. Further, the use of a flexible, rotating wheelset model is recommended for load cases leading to large magnitude contact force components in the high-frequency range (above 1.5 kHz). In particular, the influence of the radial wheel eigenmodes with two or three nodal diameters is significant. © 2011 Elsevier Ltd.This work was performed as part of the activities within the Centre of Excellence CHARMEC (CHAlmers Railway MEChanics). Measured data were supplied by Interfleet Technology Sweden and Trafikverket (the Swedish Transport Administration). Third author gratefully acknowledges the support for this work provided by the Project TRA2010-15669 (Ministerio de Ciencia e Innovacion).Torstensson, PT.; Nielsen, JCO.; Baeza González, LM. (2011). Dynamic train-track interaction at high vehicle speeds-Modelling of wheelset dynamics and wheel rotation. Journal of Sound and Vibration. 330(22):5309-5321. https://doi.org/10.1016/j.jsv.2011.05.030530953213302