The determination of kinematic parameters of the rail car’s movement on the braking positions of marshalling yard of marshalling yard

The existing methods for calculating the marshalling yards are mainly aimed at determining the height of the sorting slide and the kinematic parameters of the movement of the car in the braking zone are not considered. The article presents the calculation formulas and the methodology for determining the braking path of the car in the areas of the brake positions of the marshalling yard. The developed technique is based on a theorem of theoretical mechanics on the change in kinetic energy for a free material point in a final form. It is shown that the path the car passes while going through the breaking positions can be determined by the formula of the path with a known value of acceleration when braking the car. Using the developed formulas, the braking distance was calculated depending on the braking time and the speed of the release. The relative calculation error for the same value of the initial speed did not exceed 3.7%, which confirms the correctness of the developed calculation formulas. The proposed method allows us to determine the time it takes the uniformly accelerated movement of the car in a given section of the sorting slide to take place at a known value of the distance travelled by the rail car in the area of the brake position. The results of the research can be used to correctly solve the problems of calculating and designing of marshalling yards.

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