Chibisov Y. Increasing the efficiency of the freight transportation in the railway junction by means of the rational distribution of the trainflows on the lines of the junction.

The thesis is dedicated to the problem of the improvement of the freight transporta-tion technology in the railway junction by means of the determining the optimal amount of the trainflow on every route. For the first time the task of the choosing the route of the running trains in the railway junction is represented as multicriterion task of the vector optimization. The algorithm of its solution was developed. There were determined the incoming flow parameters of the trains of different cate-gory. The differential functions of the distribution of the random quantity of trains were ob-tained for the first time for the conditions of Dnepropetrovsk railway junction. There were also obtained the dependences between the time of the train running and the distance ac-complished and between the amount of the mechanical work wasted for the train running and the distance accomplished. There were developed the model for the determining the rational routes of the given trainflow for the terms of any possible configuration of the railway network. The model is based on the vector optimization. The rational amount of the main railway line traffic was determined for the first time for the conditions of Dnepropetrovsk railway junction. The method used for choosing the rational distribution of the trainflow in the railway junction was mathematically grounded. The functional model of railway lines was given its further development. This model was used for determining the influence between the railway line load and the main indexes of the train running. The method of the maintenance costs calculation was improved. Mathe-matically grounded recommendations for choosing the optimal routes of the trainflow run-ning in the railway junction were obtained.