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Method of calculation of reliability of rails are presented in article. Research of refusals and durability of rails on two directions of the West Siberian management of infrastructure for sites of a way with different operational characteristics is conducted. Dependence of a gamma percent resource of rails on axial loading of cars and the plan of a way is received. Conclusions about a possibility of reaching of the passed tonnage of rails in 1500 million tons gross are given.

The method and research results of information obtained by track management cars about the track state for planning track repair work to eliminate track defects have been shown. The defect types and their degrees measured by the relevant assessment method as well as the lengths of deviation from the rules of track maintenance have been analyzed. This was possible due to the latest versions of the software installed into track management cars of the КВЛ-П system. The scope and sequence of repair track work depending on their urgency, top-priority and schedule under structural and seasonal conditions has been determined. The conclusion concerning the efficiency of the presented method has been made.

In the article the analysis of safety when lifting one of the two cargo lifting cranes. Considered a method of increasing safety of works with the use of a radio channel for transmission and reception of information about the condition of the crane equipment, signals for controlling crane operations safety systems for cranes from crane operators and slingers, verbal exchange of information between the crane operators and slingers.

Non-public railway tracks and junction stations of mainline railway transport are the most important links of the «railway - clients» system. At these points, car traffic is generated and extinguished, as well as information and documents are exchanged. When organizing interaction, it is necessary to take into account the interests of not only the carrier and the owner (user) of the non-public track, but also the owners of rolling stock. The most effective solution is to develop an automated interaction management system. The purpose of the work is to determine the factors that lead to idle of cars while waiting for technological operations to be performed with them. This will allow you to find control solutions aimed at eliminating (reducing) the negative impact on the operation of the “railway - clients” system. To achieve this, an algorithm has been developed for the presence of a car on non-public railway tracks, and factors that have a negative impact on the idle of cars on non-public tracks have been identified. The proposed algorithm is the basis for developing a mathematical model for calculating the time spent by a car on non-public tracks. The presence of cars on non-public tracks is presented as a control object for the subsequent development of an automated control system for the interaction of junction stations and non-public tracks. It will have a comprehensive approach to calculating the costs and risks of all participants in the «railway - clients» system.

The authors propose the methodology of transportation on railway transport forecasting based on the construction of temporal trends.

The paper deals with the problem of the presence of thermal inertia in thermoelectric converters of general industrial design, used to measure temperature in most technological installations with an ambient temperature above 200 ° C. The aim of the study is to develop an algorithm for predicting the temperature of the environment with known thermal characteristics of the temperature sensor and to implement the algorithm directly in a general industrial programmable logic controller (PLC). As the main method, the work uses the method of mathematical modeling and description of the object in transfer functions and in the form of differential equations. The work uses a previously developed engineering technique for determining the thermal inertia time of industrial sensors, based on a single disturbance and an assessment of the dynamic characteristics of an object. On the basis of the research and mathematical modeling, algorithms for predicting the temperature of the medium by the parameters of the thermal inertia of the temperature sensor and the rate of change of the thermocouple signal have been developed and implemented. The implementation of the algorithms in the TIA Portal environment based on the Siemens Simatic S7-300 PLC using the PID Control library is proposed.

We consider the ways of increasing the effectiveness of the information-measuring complex of an automated system for monitoring and metering electricity. The possibility of reducing the volume of telemetry traffic in information transmission channels and increasing the energy efficiency of information-measuring equipment is investigated.

In article the technological actions for suppression of formation of harmful emissions from power objects using organic fuel are described - natural gas, coal and fuel oil. The methods of purification of combustion gases of the main pollutants are offered. Devices of cleaning of large volume of combustion gases of the increased concentration of ashes, and technology of combustion of fuel are presented.

The use of three-dimensional reinforcing structures is an effective method strengthen the slopes and the primary site of subgrade, it is confirmed by a complex of experimental studies. The numerical and natural modeling processes associated with the strengthening of subgrade geokompozitn structure. Natural modeling performed by the embankment of equivalent materials using real ground conditions and loadings identical in size natural. A comparison of simulation results showed high convergence, which allows use it’s in the preparation of design techniques.

In this article, a scientific approach to optimizing the electromechanical route for servicing the centralization and blocking devices at the station is considered. For this purpose, the authors propose to use the algorithm for solving the known traveling salesman problem. This algorithm is the basis for constructing technological maps of the movement of electromechanics around the station, as a component of technological maintenance cards for automation and telemechanics devices.

The problem of optimizing train driving modes continues to be relevant for a long time, despite a large number of scientific research and development in this subject area. This is due both to the general complexity of the implementation of the technological process of running the train, and to parametric uncertainty and significant variations in the parameters of the control object itself and the external environment. Well-known methods for calculating energy-optimal train driving modes (calculus of variations, the maximum principle, dynamic programming) and auto-driving systems based on them assume some simplifications of the original problem, and, as a result, implement quasi-optimal control in practice. In this regard, the development of methods for searching for the global extremum of a functional defined on the set of permissible trajectories of a train as a dynamic system is both theoretically and practically a significant task. The aim of the work is to create a computationally efficient metaheuristic algorithm for searching for energy-optimal control as a global extremum of the objective function, the values of which are calculated using a reference model of the control object. The authors have developed a problem-oriented evolutionary algorithm for calculating the optimal control of train movement based on the theory of random search. Its features are the proposed specialized operators of local random search, taking into account the specifics of the control object as a multi-mode system; combined procedures of local and global optimization based on the concept of a multi-island population algorithm with superpopulation, as well as a method of selection (selection) of promising options based on the clustering algorithm. Computational experiments have shown good convergence of the algorithm and repeatability of the calculation results. Based on the solutions obtained, a train running time controller can be implemented that implements asymptotically optimal control.

Article 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.

The integration of the railways of South and North Korea will make it possible to form an international Eurasian transport corridor and ensure the transportation of goods produced in the Republic of Korea by rail. Today, South Korean cargo owners, due to the island situation, use mainly sea transport. The organization of transportation on the Trans-Korean Railway with access to the Trans-Siberian Railway and the railways of China and Mongolia will give advantages to shippers in terms of cost and time of cargo delivery. The implementation of the project on the reunification of the Trans-Korean Railway will lead to an increase in the volume of cargo and container transportation, including in rail-sea communication. In the Republic of Korea, the main transport hub is the port of Busan, which is served by rail and road transport. The Busan transport hub includes two seaports - the new and old Busan ports, railway stations serving the container terminals of the port, as well as rear terminals to which container delivery is carried out by road. Every year, the share of rail transport for the import and export of containers to the terminals of the port of Busan is less than 7 % and continues to decrease. This dynamic is associated with the presence of infrastructure, economic and technological problems of interaction between rail and sea transport in the port of Busan. The subject of this study is the analysis of the processes of interaction between different modes of transport in the new port of Busan. The purpose of the work is to develop measures to increase the capacity of the railway component of the Busan transport hub for the organization of trans-Korean transport within the framework of the Eurasian transport system. In this paper we used theoretical methods of research, including a systematic analysis and synthesis of information. As a result of the analysis of the technical equipment, operating technology and the existing railway infrastructure of the New Port of Busan, the presence of «bottlenecks» in the functioning of the «railway - seaport» system was revealed, which hinder the effective process of container transportation. The paper considers infrastructure, technological and organizational measures to increase the processing capacity of Busan transport hub facilities. The implementation of the measures under consideration will require time to change and restructure the system of interaction of transport in the process of container transshipment. It is necessary to determine the stages of infrastructure changes based on the forecast of future traffic volumes, including using simulation modeling.

Increasing speeds on existing railway lines is one of the main challenges facing the Belarusian railway. Through the territory of the republic there are two transport corridors connecting Russia and Western Europe, as well as Ukraine and the Baltic countries. In all of the above countries, the increase in speed on the railways is very fast. Belarus can not stand aside. However, to increase the speed, it is not always enough initial information. To identify the necessary data, methods of decision theory are used. The integral probabilistic criterion method (CPI) allows one to substantiate the road parameters necessary for introducing high-speed traffic on existing lines. The proposed method of decision-making on the choice of technical parameters and equipment of the line, taking into account the uncertainty in the re-design for the high-speed movement of passenger trains. The initial data for determining the CPI is a risk matrix or a matrix of particular criteria. When using the risk matrix for each design decision option i, the dependences of the expectation of losses on the probability of realization of the design conditions p varying in the range from 0 to 1 are compiled. In the article on the proposed methodology, the reduced costs for the variants of design solutions are determined under all possible design conditions. Using these costs, a matrix of private criteria and a risk matrix are formed. A comparison was made of the design decision options for the integral probabilistic criterion, using which the recommendation of choosing the option is unambiguous and is accompanied by a quantitative assessment, which facilitates the task to the decision maker.

Currently, according to regulatory documents, the resistivity of power line wires is assumed to be the same for any permissible load current and the heating temperature of the wires is equal to 20 degrees. This account of resistivity causes significant errors that significantly affect the operating modes of power transmission lines. This article analyzes the influence of outdoor air temperature, load current, solar radiation intensity, wind speed and direction on the heating temperature of overhead power lines, and as a result, on the value of the resistivity of the wires and power and electricity losses in them. The example of the BAM highway shows that even in the conditions of one region, the outdoor air temperature varies, depending on the time of year, within a very wide range. This in turn requires careful consideration of the dependence of the resistivity value of the line wires on the external air temperature. At the same time, it is shown that it is permissible to ignore the intensity of solar radiation, wind speed and direction on the heating temperature of overhead power lines due to the lack of comprehensive information about these factors and their opposite direction. However, this assumption will only be valid for operating currents in the range from zero to double the current value corresponding to the economic density. When calculating power losses, especially in heavily loaded lines, it is necessary to take into account all external temperature influences. Due to the appearance of sensor temperature sensors, it is proposed to use them directly to measure the heating temperature of line wires and then calculate their resistivity.

The article shows the relevance of the problem of noise pollution of the environment by railway transport. The purpose of the research is to assess by calculation and instrumental methods the compliance of the existing noise levels in the residential area near the railway tracks with sanitary standards, to propose a set of noise protection measures and to substantiate their acoustic efficiency. The applied methods for measuring and calculating the equivalent and maximum noise levels of the rolling stock comply with the requirements of regulatory documents. The authors took into account the features of the propagation and shielding of sound waves in the existing residential area, background noise, and the traffic intensity of trains of various categories. The results of measurements, calculations and estimates of the noise generated by the rolling stock in the residential area in Omsk are presented. A significant excess of the maximum permissible equivalent and maximum noise levels in residential areas has been established. Comparison of the calculated and measured noise values, taking into account the standard uncertainty of the calculation methods and the expanded measurement uncertainty, showed quite satisfactory convergence of the results obtained and confirmed a significant excess of the sanitary noise standards. A set of measures is proposed to reduce the noise of railway rolling stock at the source of its occurrence and on the path of its propagation in the existing residential area. The dimensions of the embankments of the two sections of the railway tracks allow the installation of screens of low height up to 38 cm, the geometry of which is designed so that, in terms of reflection of the noise emitted by the rolling stock, they are at least equivalent to a standard noise protection wall 2 m high. For the track section located in the recess, it is proposed to install a noise barrier 6 m high and at least 1 km long. Its acoustic efficiency was calculated.

The article examines the technique of designing diagnostic system of infrastructure of electrical railways based on use of bayesian networks for prediction of probabilities of failures. To achieve maximum effectiveness of diagnosis we should minimize the number of input parameters, while maintaining the required accuracy. It is proposed to create a mathematical model of the diagnostic system, that will allow to evaluate the influence of each parameter on the accuracy of prediction of failures. To compensate the lack of source data we can use the advantage of bayesian networks - the opportunity to generate network structure by the method of expert evaluations. Generated bayesian network will perform the failure probability calculation with limited information.

The article is devoted to numerical methods for solving nonlinear heat conduction problems with considering for the relaxation of heat flow. A mathematical model is developed on the basis of a non-linear heat equation of the hyperbolic type for calculating the temperature field in an infinitely extended (unlimited) plate. The implementation of the grid method using a three-layer implicit difference scheme for solving the nonlinear hyperbolic heat conduction problem is presented for the case when the absorption of radiation energy is modeled by a volumetric heat source. A numerical solution of the nonlinear heat conduction problem in an unbounded plate is obtained taking into account the relaxation of the heat flow on the basis of the finite difference technique using the sweep method and iterative refinement of the coefficients. A calculation algorithm with a graphical representation of the results of calculating the temperature field in an unbounded plate under the influence of concentrated energy flows is described. A comparison of the results of calculations of temperature fields in mathematical modeling on the basis of the nonlinear hyperbolic heat equation and the corresponding linear model using the mean integral values of thermophysical and optical characteristics is presented. The significant differences obtained between the temperature fields corresponding to the nonlinear and linear problems justify the need to take into account the temperature dependence of the thermophysical characteristics and the absorptivity in the study of high-intensity processes of heating the bodies. The developed nonlinear mathematical model of body heating with allowance for the finite speed of heat distribution and the temperature dependence of the material properties, can be used to select the modes for processing mode bodies with high-intensity energy flows.

Resistive heating of the pantograph head due to the flow of traction current through the conductive elements of the upper node, has an uneven distribution along the frame structure and depends on the location of the contact wire on the insert. The aim of the work is to develop a mathematical model for calculating power losses in the pantograph panhead, allowing to estimate its value, taking into account the zigzag of the contact wire during the movement of electric rolling stock. The subject of the study is the pantograph panhead. The paper gives an example of calculating the frame skid of a pantograph equipped with carbon strips. Experimental studies of the current distribution over the shunts of the panhead depending on the position of the contact wire were carried out in February 2021 in the laboratory "Designs of contact networks, power lines and current collection devices" using a complex for testing current collection devices. The calculation of the heating power of the panhead is determined by the Joule-Lenz law. The results of the calculation showed that the maximum heating power is observed when the contact wire is in the middle of the panhead, while the places of the greatest losses located along its edges are above the places where the shunts are attached. The model makes it possible to obtain a functional dependence of the heating value along the panhead. The obtained results of the skid heating power distribution make it possible to supplement the complex model of the thermal state of the pantograph developed at the Omsk State Transport University with the participation of the authors of the article. The versatility of the developed model makes it possible to investigate various zigzags of the contact wire and evaluate the effect on the distribution of traction current along the panhead, depending on the location of the shunts and their number.

This article discusses the process of maintenance of railway automation devices. The aim of the work is to reduce labor costs for maintenance of track circuits of railway automation. Presents the method for automating the process of checking on the shunt track circuits shunting sensitivity of track circuit by at cross-rack and scheme of the device that implements this method. The values of shunt resistance equivalent to the imposition of regulatory shunt at predetermined points of the track circuit are calculated. The results obtained in the paper can be used for the improvement of systems of automation of existing railways.

We propose the concept of the new system for monitoring and electricity metering on the feeders of the D.C. contact network. The system is based on previously designed prototype that has been put into operation, and differs from it in new solutions that allow to achieve greater mobility and simple scalability. We describe the basic technical solutions, the system functions as well as its potential.

Substantiated the application of the probabilistic analysis of the break-even on the basis of a Monte Carlo method for the study of freight as a complex stochastic systems. Analysis was carried out on the basis of data of the Ulan-Bator railway.

Railway telecommunications are inherent facilities participating in the organization of efficient and safe transport process. Generally, reliable operation of telecommunication devices is provided by the implementation of preventive maintenance that quality analysis is performed on the incidents during the latest reporting period. The possibility of experimental estimation using computer techniques surely has advantages. In the paper, we have defined an objective of the development of a simulation model of the operation process of railway telecommunications so as to assess the inherent availability and maintenance quality indicator. The model allows carrying out a computer experiment and estimation of the abovementioned measures in an automated way taking into account the following input parameters: failure rates, periodicity and length of maintenance, time of repair, the probability of erroneous actions of service staff and the probability of spare and replacement parts lack.

To improve the accuracy of the diagnosis of the technical condition of rolling stock, it is necessary to develop new algorithms for the digital processing of signals coming from sensors at the time of the passage of the axes of wheeled pairs of wagon carts during the uniform movement of the train on the straight section of the railway track. The use of modern mathematical application software packages to model digital-based data processing algorithms reduces the cost and time of developing automated systems to diagnose the technical condition of the rolling stock of railways. To assess the accuracy of the fixation by the magneto-induction sensor of the moment of passage of wheel pairs axly, an asthigmatic model is proposed, allowing to investigate not only the energy properties of the sensor, but also the shape of the output signal, taking into account the real dimensions of its magnetic core. The developed model allows you to classify the pore. The developed model allows to classify the order of astigmatism model magnetoinduction sensor based on a set of discrete virtual sensors

Shotcrete lining is one of the most common types of temporary supports in tunnel construction. The influence of shotcrete lining on design calculations of permanent lining is difficult, because there is no method of designing at the present time. This leads to increasing in consumption of materials and labour of construction. The information about the influence of the basic mechanical properties of soils, geometrical size of construction per value of temporary shotcrete lining factor was obtained during research. These data formed the basis for futher development method of designing.