Abstract
The dynamic modelling of railway track response and of the interaction of vehicle and track at low and mid frequencies that are significant for the track deterioration, is presented. The response of the track subjected to a moving vehicle is simulated for a stationary randomly distributed ballast stiffness with a standard uniform distribution and a normal distribution. The response of the track components is solved by the Finite Element Method. Monte Carlo simulation was applied to estimate the dynamic track response. The dynamic amplification resulting from the simulated passage of the locomotive of the type E 499 (85 t) is presented.
Highlights
The dynamic response of a railway track subjected to moving vehicles in service conditions generally has a random character
The less attention is paid to the influence of the vertical track stiffness on the response of track components and on the evaluation of forces transmitted by the track components
The model presented in this paper, developed at the Department of Mechanics [6], was addressed to the study of dynamic behaviour of track structure, especially the evaluation of the dynamic coefficient for the track components
Summary
The dynamic response of a railway track subjected to moving vehicles in service conditions generally has a random character. The less attention is paid to the influence of the vertical track stiffness on the response of track components and on the evaluation of forces transmitted by the track components. The model presented in this paper, developed at the Department of Mechanics [6], was addressed to the study of dynamic behaviour of track structure, especially the evaluation of the dynamic coefficient for the track components. The dynamic behaviour and the response of track components (rails, sleepers, the ballast) due to variability in the vertical stiffness of rail supports are presented in this paper. Where: w(xЈ, t) is the vertical motion (dynamic deflection) of the rail in the stationary co-ordinates (xЈ, t). Where: w(x,t) is the vertical displacement function (dynamic deflection) of the rail in the moving co-ordinates (x, t)
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