No abstract

The paper aims to the topical issue of improving the system in the planning of carriage of dangerous goods by rail subject to ensuring a high level of safety of the transport process and minimal costs for its implementation. Formalization of this process leads to the formation of an optimization task of the two-stage mathematical model. To implement the first stage, a mathematical model in searching the best route based on risk minimization is developed. In order to exclude the unacceptably complex and expensive options for the carriage of dangerous goods from the many possible routes, the authors abided by the condition not to exceed the critical operating costs. The second stage in the process of planning routes for dangerous goods takes into account the hazard identification study in the technological process of car movement with dangerous goods. Considering that the probability of a potential traffic accident is a complex random variable, which is due to a set of elementary previously unknown events, its estimation was made on the basis of the Bayesian approach. Based on the simulation results, the following reliability values are determined at which a transport accident should not emerge.

Інтенсифікація роботи залізничного транспорту, як однієї із ключових галузей економіки країни, є головним у рішенні завдання повного й своєчасного задоволення потреб бізнесу в перевезеннях. Залізничний транспорт і в перспективі буде виконувати основний обсяг масових перевезень, і насамперед кам’яного вугілля, руди, чорних металів, лісу, продовольчих вантажів, хімічних і мінеральних добрив, нафтопродуктів, будівельних матеріалів. Удосконалення технології роботи станції включає заходи, спрямовані на скорочення простою вагонів, раціональне використання технічних засобів, якими обладнана станція, скорочення непродуктивних витрат, підвищення доходності залізниці, що потребує постійної уваги та корегування оперативного плану формування вантажних поїздів, утримування технічного оснащення станції на достатньому рівні, який забезпечував би її стійку та безаварійну роботу, спрямовану на задоволення потреб перевізного процесу. Основною задачею даної роботи є визначення головних напрямків поліпшення експлуатаційної роботи сортувальних станцій.

The aim of the study is to improve the technology of interaction between road and river transport on the territory of the port. The object of research is the port handling fronts; the subject of research is the technology of servicing various types of transport on the territory of the port terminal. Research methodology - simulation. The result of the study is an analytical assessment of the work of inland waterway transport for the carriage of goods, which indicates the absence of an integrated approach to improve the interaction of various modes of transport on the territory of the port terminal. Therefore, it is proposed to search for a rational technology based on simulation methods, which can reduce the time of non-production downtime. Competent organization of reloading from road to river transport and vice versa provides for the creation at the cargo terminal of such a traffic control system that provides collection and storage of operational information about the location of vehicles on the cargo fronts of the port terminal, the state of loading and unloading mechanisms, and allows making decisions on their use and transmitting commands to car drivers in order to improve the efficiency of interaction between road and river transport during cargo transshipment. For the proposed technology, the time for transshipment of cargo and idle time of vehicles under unloading was calculated using the theory of queuing systems. Counting the idle time of vehicles in various disciplines of choosing the cargo front (random or adjustable mode) made it possible to select the optimal system for regulating the approach of vehicles to the cargo fronts of the port terminal. The expected economic efficiency due to the reduction in the time of transshipment of goods from one mode of transport to another, according to the results of calculations, is 20,5 thousand EUR. The scientific novelty lies in the theoretical substantiation of various technologies for the interaction of road and river transport on the territory of the port terminal. At the same time, the problem of determining the optimal control system for the delivery of vehicles of the cargo fronts of the port terminal, on which reloading to river vessels occurs, has been formalized and solved using the methods of simulation modeling. This allows to reduce the downtime of transport units and more efficiently use the loading and unloading mechanisms, and, consequently, to reduce cost indicators. Practical significance: the proposed technology can be introduced into the technological processes of large river port terminals, where various types of transport interact. The simulation results are recommended to be used by the dispatcher staff when planning to bring vehicles to the berthing cargo fronts.

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