The effect of unsupported sleepers on the dynamic behaviour of a railway track is studied based on vehicle-track dynamic interaction theory, using a model of the track as a Timoshenko beam supported on a periodic elastic foundation. Considering the vehicle's running speed and the number of unsupported sleepers, the track dynamic characteristics are investigated and verified in the time and frequency domains by experiments on a 1:5 scale model wheel-rail test rig. The results show that when hanging sleepers are present, leading to a discontinuous and irregular track support, additional wheel-rail interaction forces are generated. These forces increase as further sleepers become unsupported and as the vehicle's running speed increases. The adjacent supports experience increased dynamic forces which will lead to further deterioration of track quality and the formation of long wavelength track irregularities, which worsen the vehicles' running stability and riding comfort. Stationary transfer functions measurements of the dynamic behaviour of the track are also presented to support the findings.
On the effect of unsupported sleepers on the dynamic behaviour of a railway track
Über den Einfluss freitragender Schwellen auf das dynamische Verhalten von Eisenbahnschienen
Vehicle System Dynamics ; 49 , 8-12 ; 1389-1408
2011
20 Seiten, 24 Bilder, 1 Tabelle, 16 Quellen
Article (Journal)
English
The Dynamic Response of Railway Track With Unsupported Sleepers
SAGE Publications | 1985
|On the effect of unsupported sleepers on the dynamic behaviour of a railway track
Online Contents | 2011
|On the effect of unsupported sleepers on the dynamic behaviour of a railway track
Automotive engineering | 2011
|On the effect of unsupported sleepers on the dynamic behaviour of a railway track
Taylor & Francis Verlag | 2011
|Load impact on railway track due to unsupported sleepers
Tema Archive | 2005
|