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V.4(44), 2020
2-8The article discusses the specifics of the locomotive reliability indicators use in the Russian Railways. Examples of locomotive reliability indicators and the indicators used in the Russian Railways in the conclusion of service contracts, including under the life cycle contract are given. A method of transition from national standard to Russian Railways has been proposed. It is concluded that these procedures can be automated. -
V.3(43), 2020
20-27The article proposes a method of using the mathematical apparatus of the theory of fuzzy sets in automation of the locomotives reliability management, because when writing algorithms there is a problem of transition from not fully formalized concepts of human communication to formalizing software. Examples of the fuzzy sets use in calculating the locomotives reliability are described. When calculating the reliability parameters manually, the volume of calculations does not allow you to move to more complex algorithms. When there are automated systems, it is necessary for each indicator of the transportation process, which affects its reliability, to set the function of belonging to a dangerous and normal value using the mathematical apparatus of the theory of fuzzy sets. Then the risk of a dangerous event will be assessed in probability, taking into account the logical claim to the risk. -
V.4(24), 2015
33-39The results of experimental research on the diagnostic features of wheel-motor unit assemblies dependence on the speed of the wheel-pair. The parameters of the distribution of diagnostic features are given and a method of providing higher reliability of diagnostics of electric train WMU is provided -
V.1(49), 2022
57-67The article assesses the state of the market of transport and cargo services in Uzbekistan, considers the problem of scientific justification of the rational placement of cargo facilities in the country. Analysis of the problems of transport services has shown that freight traffic flows have spread out, negative trends have manifested themselves in the form of regular growth in the cost of fuel and energy resources, tightening of regulatory requirements, growth of customs duties, sanctions in the form of cancellation of previously introduced benefits, and more. However, such indicators of rail freight transportation as the range of container transportation and average travel time are stable in rail traffic, i. e. the diversification of the cargo base and the tendency to full capacity utilization take place. Separately, it should be noted that rail transportation interacts with other transport industries - automobile, air, sea, river and other modes of transport - as partners, not as competitors - multimodal freight transportation is widely developed, special logistics agencies operate to ensure the organization of uninterrupted work during freight transportation. Uzbekistan's railways need to be reformed, and possibly restructured. At least, private capital funds are already being attracted to the system of private carriage operation. The article describes the scientific methods of analysis and synthesis, classification, mathematical statistics used in the study. A roadmap of qualitative transformations for the reorganization of the transport and cargo industry has been proposed, which will bring positive results for the transport infrastructure as a whole.The results of the study will further reveal the capabilities of terminal networks capable of providing in a short time the delivery of large volumes of necessary cargo to domestic and foreign markets, the uninterrupted functioning of the necessary infrastructure for the placement of cargo facilities on the railway network. The object of the study is the state of transport infrastructure with a decisive role in trade. -
V.3(43), 2020
58-65In the article it is developed a model for the locomotives life cycle managing in their maintenance and repair using automated technical diagnostic systems. Based on statistical analysis of data on the operation of locomotives, the impact of the reliability of the locomotive and its maintenance and repair system on the efficiency of locomotives is theoretically justified. A method of analyzing the technical diagnostic systems effectiveness using the mathematical apparatus of information theory and of predicting the duration of maintenance and repair time with the dynamic use of accumulated statistics on the duration of previous repairs has been developed. -
V.1(13), 2013
70-75The article discusses the control systems for mechanical vibrations on the basis of improved modernized nonlinear inverse dynamics algorithms and its use for vibratory stands of technical diagnostics to diagnose mechanical products of railway transport systems. -
V.4(32), 2017
77-88The analysis of wave processes in the system including electric transmission lines, traction substations, AC traction network and electriclocomotives is necessary to accurately assess to energy performance of its work. This system contains concentrated and distributed parameters, consequently the analysis of such a system is difficult and the rolling stock which is also a part of this system represents a dynamic load. The proposed mathematical model of the alternating current traction power supply system allows us to consider electromagnetic processes at its various points taking into account wave processes. -
V.4(16), 2013
77-83The article covers stability and accuracy for restoration of uneven sampled signals, using basis functions. The accuracy and stability are explored for different transfer system orders, period between basis functions and offset of the basis functions system against restored samples. -
V.2(38), 2019
82-90The need to apply various methods for predicting the technical condition of reinforced concrete supports of the contact network is currently a necessary condition for ensuring the safety of train traffic. Such a need arose due to the presence in operation of supports with extended service life, in the absence of a reduction in loads, without the presence of various kinds of redundancy. The article describes a method for predicting the technical state of the supports of the contact network. Solving the problem of exploitation, which consists in the fact that it is rather difficult to reveal the system of failures of the considered object of exploitation, under the influence of many factors. The probability of finding the contact network supports in a certain state is expressed through the statistical properties of the contact network supports, based on the change in the carrying capacity -
V.4(28), 2016
94-101The paper deals with the problem of sustainable innovation development of the electric power system of Mongolia, taking into account the geographical position of the country on the border of a transport route between China and Russia. In the broadest sense between the Asian industrial region and Europe, the turnover between them is increasing every year. The main constraining factor on the way of this process is not electrified main railway line, passing through the territory of Mongolia. Shown the advantages of railway electrification to solve the problems of power supply industry and agriculture. The most important objective is the electrification of the transport route Sukhbaatar Ulaanbaatar-Zamyn-Ude, the length of 1111 km. It is shown that the realization of this goal will reduce rail route from Europe to Central Asia of 1,025 km. The forecast of development of transportation in the future. Along with this a forecast of the Mongolia’s electric power system, in which the traction electric load would be approximately 22%. Included the corresponding graph required the development of generating capacities in the Mongolian power system in order to adjust the available capacity to 3500MW by the year 2025. Proved significant advantages of electrified railway through improving electric locomotive in comparison with diesel locomotive. In contrast to the significant proportion of electrified railways of Russia on a direct current, proposed the path of traction power supply system 2x25kV. Following the example of other highly developed countries, it will go to the use of high-speed railways. Thus it is achieved balanced development of Mongolia's electric power system based on electrification of the transport corridor from Asia to Europe. -
V.1(13), 2013
110-116This paper presents an algorithm of computational experiments by definition shear load and tension mounts in the elements, which increases the safety of the operation of the railway transport system. -
V.2(22), 2015
122-130Article is devoted to production and occupational exposure to «biological factor» for workers оf railway transport. Purpose - improving the system of occupational safety in railway transport under the influence of workers pathogenic organisms. To identify gaps in the system of assessment «biological factor» has been studied Russian normative documentation for a special assessment of working conditions and carried out long-term work on hygienic assessment of working conditions. The article defines the term «biological factor», justify the need for of risk assessment of the harmful factor, expand the list of sources and professional group of railway workers potentially exposed to «biological factor». In this article presents a device for protection and prophylaxis railway workers from biological factor. The principle of operation of the device is based on the integrated use of methods of ultrasonic treatment and ionization to disinfect the indoor air of railway stations, bus stations, subway stations. According to the results of studying the Russian regulatory documentation in the transportation of dangerous goods by railway, identified the main problems and their solutions, in terms of biological safety: formulated the term «biologically dangerous goods»; the necessity of creating a class or sub-class «biologically dangerous goods» and its implementation in the existing rules; developed a simple list of «biologically dangerous goods»; the possibility of the impact of these goods on railway workers. -
V.2(26), 2016
134-142In the article the questions of increase of efficiency of structural subdivisions, members of the directorates of the West Siberian railway - branch of JSC "Russian Railways", such as infrastructure Directorate, Directorate railcar rolling stock and the Directorate of buildings and structures. The aim of this work is to identify structural units with the lowest energy efficiency indicators. This requires estimation of an indicator such as relative energy efficiency over a period of time equal to one calendar year, based on data of annual consumption of electric energy and annual volume of enterprise work. The article also outlines the main provisions of the concept analysis and monitoring the energy efficiency indicators of stationary objects of the railway transport, which will identify inefficient structural subdivisions with the use of control actions to reduce irrational consumption of energy resources. Calculation of the relative energy efficiency is one of the stages of this concept. The result is a received charts of the relative energy efficiency of structural subdivisions of the West Siberian railway which allows to make a comparison of this indicator. According to the results of comparison found that 10 of the 65 structural units have a low indicator of relative energy efficiency. This suggests the need for careful study the reasons of the low values of energy efficiency in these structural subdivisions and proposals the measures to eliminate this situation. The method and sequence of these activities proposes into the third and fourth stages of the concept. The establishment and subsequent application of a unified approach to the analysis and monitoring of energy efficiency indicators for all departments will increase the energy efficiency of the territorial branches of JSC "Russian Railways" and the holding company as whole.