Modeling the effect of rail sub-slope on the wear
The relevance of the issue of modeling the effect of rail sub-slope on the wear intensity is due to the need to find technological solutions to reduce the wear rate in the contact of wheels and rails. The aim of the work is to find the relationship between the sub-slope of rails and the wear intensity. The research is based on experimental data obtained from the results of full-scale measurements of the sub-slope carried out in 2019-2020 on the Moscow Railway. In this article, it was proposed to divide the measurement sites into two types according to the sub-slope parameter. The authors proposed two types of functions describing two different types of rail sub-slope deviations registered on the rail track. The influence of deviations of the sub-slope described by the first and second types of the obtained functions on indicators of the force interaction of the track and rolling stock and wear in the contact zone of the wheels with the rails was evaluated using the Universal Mechanism software package. As a result of calculations, the values of lateral and frame forces, as well as indicators of wear - slip and maximum pressure at the point of contact of the wheels with the rails are obtained. The adequacy of the obtained values of the wear intensity in the contact zone of the wheels with the rails was estimated by the authors on the basis of comparison of the calculated data with the experimental data of the wear intensity obtained on the sections of the Moscow Railway. A change in the sub-slope along the length of the section can cause an increase in the intensity of wear in the contact area of the wheels with the rails, especially if there are significant deviations from the average value of the sub-slope.