Abstract
For reliable assessment of railway vehicles in the matter of vehicle safety, track fatigue, ride quality and acoustics the operating conditions and appropriate characterization parameters of the track have do be known. The state of the art method for the classification of track geometry is defined in the European Standard EN 13848 and EN 14363 based on maximum values and standard deviations of the track geometry. The open question is: "Does this assessment method consider the causal relation between the characterization parameters and the vehicle-track interaction with respect to the mentioned objectives?" Investigations up to now clearly show that the correlation between the vertical wheel force Q and the longitudinal level z is low both for maximum values as well as standard deviations. This is on the one hand due to the short band pass filtering of the wavelength and on the other hand by the frequency dependence of the wheel-rail forces with respect to the track excitation. For consideration of these aspects, a method is developed using typical vehicle transfer functions to assess the track geometry. In order to estimate the vehicle response caused by corresponding excitations, the transfer functions for different types of vehicles and velocities have to be calculated. Then track geometry data are weighted with "representative" transfer functions. The response values obtained in this way may be used to classify the track geometry quality. The results of this track geometry assessment method impressively show that a very high and much better correlation between vehicle response and track geometry characterization can be achieved.
Original language | English |
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Title of host publication | Proceedings of the Mini Conference on Vehicle System Dynamics, Identification and Anomalies |
Place of Publication | Budapest |
Pages | 147 - 158 |
Publication status | Published - 2008 |
Event | 11th Mini Conference on Vehicle Dynamics, Identification and Anomalies - Budapest, Hungary Duration: 10 Nov 2008 → 12 Nov 2008 |
Conference
Conference | 11th Mini Conference on Vehicle Dynamics, Identification and Anomalies |
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Country/Territory | Hungary |
City | Budapest |
Period | 10/11/08 → 12/11/08 |
Treatment code (Nähere Zuordnung)
- Application
- Theoretical
- Experimental