Dynamic train-track interaction at high vehicle speeds-Modelling of wheelset dynamics and wheel rotation
Artikel i vetenskaplig tidskrift, 2011

Vertical dynamic train-track 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 wheel-rail contact forces using the flexible, rotating wheelset model are compared with contact forces based on rigid, non-rotating models. For a validation of the train-track 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. (C) 2011 Elsevier Ltd. All rights reserved.

2005

2007

nta g

aar n

rail contact forces

corrugation

irregularities

Författare

Peter T Torstensson

Chalmers, Tillämpad mekanik, Dynamik

Jens Nielsen

Chalmers, Tillämpad mekanik, Dynamik

Luis Baeza

Universitat Politècnica de València

Journal of Sound and Vibration

0022-460X (ISSN) 1095-8568 (eISSN)

Vol. 330 5309-5321

Ämneskategorier

Maskinteknik

DOI

10.1016/j.jsv.2011.05.030