Improvement of the railway track efficiency by minimizing the rail wear in curves

Abstract

The article presents the analysis results for the parameters measurements of the rail track and the ratio between values of the vertical and side wears of rails in curves of different radii under different operating conditions. It is shown that the installed elevations of the outer rail do not meet the contemporary requirements in increasing the efficiency of the track while minimizing the rail wear. At the second stage of the research, various sections were examined by type of traction, technical equipment, plan parameters and the longitudinal profile. As an example, the results of calculations are presented in Lviv-Rava-Ruska section as a promising project that can ensure the integration of railway transport in Lviv-Warsaw direction. Analysis of the results obtained with the help of the software package – MoveRW and RWPlan programmes, allowed to determine such a combination of elevations of the outer rail in curves, so that trains of different categories realize the lowest values of cross unbalanced accelerations, which provide the minimum wear of rails in compliance with regulatory requirements for unbalanced acceleration, changing this acceleration in time, elevating speed of a wheel on the removal of the outer rail.

Dynamic indicators influencing design solution for modernization of the freight rolling stock

“…It was noted in the works [8, 14,26] that during the movement of wagon in a train along the curved track sections, the forces of interaction between the wheels and rails are directly affected by the transverse forces that arise from the action of longitudinal forces in the auto-couplings of wagons in traction modes on long grades and during braking, especially the regenerative one. Moving along the curve, a wagon under the action of longitudinal forces in auto-couplings may take different positions relative to the track axis, which greatly affects the values of lateral horizontal forces of interaction and the force of friction of wheels and the rails.…”

Influence of different factors on the value of the rail wear rate

“…The study [4] analyses the accumulation of deviations in the geometric parameters of a tramway track as a function of the axial load, with a hard surface, which is also applicable to railway tracks when the vertical and horizontal irregularities of the track increase with the tonnage transported. The article [5] analyses the vertical and lateral rail wear and the influence of the outer rail height, the type of traction and the longitudinal profile of the track. In order to automate railway straightening systems in the horizontal and vertical planes [6], a mathematical model has been created that allows the rational determination of curve parameters during the operation of railway machines.…”

Investigation of the Glued Insulated Rail Joints Applied to CWR Tracks

“…In relation to the above-mentioned technologies and technical solutions, we can mention some special ones such as application of noise and vibration damping layers and elements [2][3][4][5][6]; ensuring lower stress in the railway permanent ways' that result and ensure lower elastic and plastic deformation in the track as well as in the layer structure [7][8]; techniques which provide special work processes, e.g. tamping of wide sleepers or side tamping that does not disturb the dense, compacted sub-ballast layer [9][10]; new and newer technologies ensuring decreased dynamic effects that can result in subsidiary failures (maybe cracking, fracturing, breaking) in the tracks' elements [11]; minimizing the wear of track elements (mainly the rails') [12] and lowering the ballast breakage [13][14][15][16]. The determination of the geometrical deterioration process is also quite important [17][18] for the ability to predict maintenance work.…”

“…Fig 12. Measured deformation line of insulated rail joints assembled by polymer composite fishplates with and without gluing in the case of 900 mm support bay length, as well as 48 rail profile…”