THE DEPENDENCE OF MEAN VALUES OF VERTICAL FORCES AFFECTING A RAIL ON THE TRAIN VELOCITY
I. M. Anisina
VANT. Ser.: Mat. Mod. Fiz. Proc 2023. Вып.1. С. 60-67.
This paper extends a series of papers on the analysis of data (collected by employees of the All-Russian Scientific Research Institute of Railway Transport) on the rutting of subgrades, when one, or several long trains pass the rail track. The mathematical model offered in these papers provides an adequate description of the soil deformation under an applied load and its subsequent relaxation, however, it does not reproduce the experimentally found dependence of the mean values of the vertical forces affecting the rail track on the train velocity. The present paper considers this problem. The model offered in the paper describes the load on rails and rutting of subgrades depending on the train load with account for the radial acceleration and damping properties of soil and provides a good agreement with the available data of experiments. The developed method allows predicting the growth of dynamic deviations in vertical plane, if long trains pass the rail track, and such predictions are required to plan the track surfacing works. Keywords: rail track, subballast base, settlement of track, model of standard linear solid, radial acceleration, viscosity.
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