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.

nta g

corrugation

rail contact forces

2007

irregularities

aar n

2005

Författare

Peter T Torstensson

Chalmers, Tillämpad mekanik, Dynamik

Jens Nielsen

Chalmers, Tillämpad mekanik, Dynamik

Luis Baeza

Universitat Politecnica de Valencia (UPV)

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