Assessment of Train Delays on the Railway Network by Modeling on the Conditions of Stochastic Train Flow

The subject of the research is delays in the process of moving transport units on the railway network. Existing solutions to similar problems for rail transportation is generally based on the scheduling and construction of variant graphs of trains. The task of scheduling is a complex task that requires a large amount of additional data. However, the main problem is the computational complexity of the problem, which does not allow finding the optimal solution of practical problems. Therefore, it is necessary to use approximate methods to calculate the variants of the technology of passing train flows and the development of transport infrastructure. The aim of this research is to develop a method of determining the volume of delays of skipping train flows in the case of varying traffic and the ratio of different categories of trains in the flow. A method is proposed to study delays in the promotion of the railway transport network. Applications for transportation are formed on the basis of simulation passes random flow requirements. The influence of the proportion of trains of different speed categories (freight and passenger) in the flow and the level of traffic on train delays is investigated. The method of simulation modeling of demand for transportation and promotion of transport units on the network is used for calculations. The expediency of separation, if it is necessary to provide high throughput, flows with different speeds due to the specialization of individual lines of the network is confirmed. The result of the work is the dependence of the value of train delays in the transport network on the load and the ratio of trains of different speeds (freight and passenger). The proposed method is aimed at the formation of analytical expressions for further evaluation of delays in the passage of trains on the network. The models will simplify the calculation procedure and can be used in making decisions to improve the railway infrastructure, as well as the system of organization of train traffic.

железнодорожная сеть, пропускная способность, задержки, смешанный поток транспорта, имитационное моделирование, railway network, capacity, delays, mixed traffic flow, simulation

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