Plotting of the Probability Curve of the Main Specific Motion Resistance in the Classification Tracks Taking into Account the Car and Cut Traffic Volume
To date, the design of gravity hump is carried out in accordance with the “Rules and regulations for design of sorting devices on 1520 mm railways tracks”. Runners with specified characteristics by mass and specific motion resistance are used for calculation. A large number of scientists suggest moving from regular runners to probability runners, which would be based on the climatic zone and car traffic volume. Accordingly, with this approach, the values of the main resistivity of bad and good runners for different hump yards will be different. On the hump yard, most of the car are processed in multi-car cuts, which has not been sufficiently investigated either. In this article, the influence on the main specific motion resistance is analyzed. As a result of the study, the following conclusions were drawn: the cut traffic volume influences on arrangement of the main specific motion resistance. The arrangement takes up the form of a normal distribution with an increase in the number of car in the cut, the dispersion and asymmetry decrease. The dependence of the arrangement parameters on the number of cars in the cut is hyperbolic law. For cars of the same weight category, the arrangement coefficients and formulas for finding dispersion and asymmetry are given in the article. The mathematical expectation depends on the weight category of cars. If the cut consists of cars of the same weight category, the mathematical expectation remains a constant value for any number of cars in the cut. If the cut consists of cars of different weight category, the mathematical expectation will decrease with increasing the number of cars in the cut.