Methodology for assessing the impact of the main comparative resistance to movement of various wagons on the weight of the freight train

Abstract

The main comparative resistance to movement of freight cars is one of the main parameters in the normalization of the weight of trains on the plot, consisting of a combination of different wagons. This article developed an improved methodology for determining the main comparative resistance of trains to movement, consisting of a combination of different wagons, and evaluated the effect on the weight of trains on a railway track. The various carriages were researched in two different cases to investigate the effect of basic comparative resistance to movement on the weight of the freight train. In the first case, the average basic comparative resistance was calculated based on the proportion of wagons in the composition by number (existing methodology), in the second, the average basic comparative resistance was calculated based on the proportion of wagons in the composition by weight with different firing loads (proposed methodology). The result was found to be that the difference between the average basic comparative resistance calculated on the basis of the proportion of the different wagons in the freight train in the composition in terms of their number and weight, on average, is up to 26%. In this case, it is based on the fact that the average basic comparative resistance obtained on the basis of the share in the composition by weight of different wagons is always smaller or equal to the value obtained by their number. In the example of plots with different accounting slopes, it is indicated that the weight of the train obtained on the basis of the share in the composition by the weight of the wagons varies from 52 to 333 tons from the value obtained by the number of them.