Кафедра "Вагони та вагонне господарство" ДІІТ
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ENG: Department of Wagons and Rolling Stock
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Item 10 лет отечественной отрасли пассажирского вагоностроения: история, сегодняшний день, перспективы развития(ТОВ ЦІТУ, м. Харків, 2011) Приходько, Владимир Иванович; Хворост, Е. Ф.; Лутонин, Сергей Витальевич; Шкабров, Олег Анатольевич; Пшинько, Александр Николаевич; Мямлин, Сергей Витальевич; Донченко, Анатолий ВладимировичRU: Статья посвящена десятилетию отечественной отрасли пассажирского вагоностроения. История, сегодняшний день, перспективы развития.Item Aлгоритм вирішення задачі контакту колеса і рейки(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2006) Савчук, Орест Макарович; Рейдемейстер, Олексій Геннадійович; Савченко, Костянтин Борисович; Шикунов, Олександр АнатолійовичUK: Наведений алгоритм вирішення контактної задачі силової взаємодії пари «колесо–рейка» у сучасній постановці з використанням детального математичного моделювання колеса і рейки методом скінченних елементів.Item Choosing of Suspension Gear Parameters of Coache Model 61-779(Department of Railway Vehicles, Aircraft and Ships, BME Section of Rolling Stock, SSME, Budapest, Hungary, 2013) Myamlin, Serhiy V.; Prikhod'ko, Vladimir I.; Zhyzhko, Victoriia V.; Shkabrov, Oleg A.EN: Researches that focused on choosing of running gear's parameters and especially on spring suspension parameters are very important during creation of new passenger rolling stock. In the research calculations that determine strength characteristics of springs of central and axle-box suspension gear of bogies during its (bogies) using under coaches' (passenger cars) model 61-779 of JSC "Kryukov car-building company" are done and relevant dynamic parameters are determined. The simulation used a computer program «DYNRAIL», developed in Dnepropetrovsk National University of Railway Transport (DNURT). As a result of research parameters of spring suspension for designs of new passenger cars chosen.Item Coefficient of Stability Against Lift by Longitudinal Forces of Freight Cars in Trains(IOP Publishing Ltd., 2020) Shvets, Anzhela O.; Shatunov, Oleksandr V.; Dovhaniuk, Stepan S.; Muradian, Leontii A.; Pularyia, Andriy L.; Kalashnik, Vladimir A.EN: The paper is devoted to a theoretical study of the car movement stability when exposed to longitudinal forces of a quasistatic nature. The authors obtained the expressions for calculating the resistance coefficient of the car lift by the longitudinal compressive force acting on the car as part of a freight train. The influence of some factor’s combination on the longitudinal forces, at which the car movement stability is still maintained, was analyzed using the analytical dependencies to assess the longitudinal loading of cars in trains. The study was carried out by analytical method for assessing the freight car stability when moving at different speeds along curved track sections. The calculations were made in a curve of small radius taking into account the inertia forces from the unbalanced acceleration. In a theoretical study, the influence of quasistatic longitudinal compressive forces depending on changes in speed and force value, as well as the influence of friction in the wheel flange and rail contact and the eccentricity of fastening the automatic coupler shank on the stability were considered. When applying the results obtained, the stability of freight rolling stock can be increased, which in turn will remove some existing restrictions on the permissible speeds and increase the technical speed of train movement. Using the described methodology for determining the lift resistance coefficient will make it possible to justify the cause of derailment, as well as to develop and put into practice technical measures to prevent the lift of carriages, thrusts and shears of the track.Item Dependence of Air Spring Parameters on Throttle Resistance(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2016) Reidemeister, Alexey G.; Kivisheva, Anastasiia V.EN: Purpose. In this paper it is necessary to conduct: 1) research and analyse the influence of throttle element pneumatic resistance on elastic and damping parameters of air spring; 2) to obtain the dependence of air spring parameters on throttle element pneumatic resistance value. Methodology. The work presents the elaborated model of the air spring as a dynamic system with three phase coordinates (cylinder pressure, auxiliary reservoir pressure, cylinder air mass). Stiffness and viscosity coefficients were determined on the basis of system response to harmonic kinematic disturbance. The data for the analysis are obtained by changing the capacity of the connecting element and the law of pressure variation between the reservoir and the cylinder. The viscosity coefficient is regarded as the viscosity ratio of the hydraulic damper, which for one oscillation cycle consumes the same energy as the air spring. The process of air condition change inside the cylinder (reservoir) is considered to be adiabatic; the mass air flow through the connecting element depends on the pressure difference. Findings. We obtained the curves for spring viscosity and stiffness coefficients dependence on the throttle resistance at three different laws, linking airflow through the cylinder with the pressure difference in cylinder and reservoir. At both maximum and minimum limiting resistance values the spring viscosity tends to zero, reaching its peak in the mean resistance values. Stiffness increases monotonically with increasing resistance, tends to the limit corresponding to the absence of an auxiliary reservoir (at high resistance) and the increase in cylinder volume by the reservoir volume (at low resistance). Originality. The designed scheme allows determining the optimal parameters of elastic and damping properties of the pneumatic system as function of the throttle element air resistance. Practical value. The ability to predict the parameters of elastic and damping properties of the pneumatic system as function of the throttle element air resistance will improve the running performance of carriages, the comfort of passenger transportation and reduce the wear of the rolling stock and the track caused by interaction of carriage and rails.Item Design Review of Gondola Car(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Myamlin, Serhiy V.; Kebal, Yuriy V.; Kolesnykov, Serhii R.EN: Purpose. To ensure the constantly growing volume of freight transportations it is necessary to introduce the innovation rolling stock. It should have the best technical and economic parameters in comparison with the existing fleet. Gondola car is the most popular type of railway freight car. Designs of the modern gondolas are based on many years of operating experience and numerous tests carried out by design and research organizations in the field of car building. To improve the body structure of gondolas it is necessary to perform a review of the existing structures and to identify the trends in their improvement. Methodology. The works on improvement the designs of produced gondolas are held by many engineering organizations in almost all industrialized countries. Analysis of the existing body designs of gondola cars is possible by analyzing the research in the field of transport engineering, namely patents, scientific articles, producers catalogues and so on. Findings. When analyzing it was determined that there are gondolas of different designs, but the most common are the gondolas with a solid floor and unloading hatches, the covers of which form the floor of gondola design. An effective method for reducing the gondola empty weight and increasing the body volume is also the use of aluminum alloy instead of steel. Results of the improvement analysis of the gondola bodies` designs showed that the creation of the modern gondola car requires from designers and scientists the implementation of scientific and technical solutions providing the increase of carrying capacity and the body volume, reduction of the gondolas empty weight, increase in repair intervals while improving the strength and dynamic qualities at the same time. Originality. For the first time the gondolas designs were analyzed, their advantages and disadvantages were considered and the trends in improvement of the given structures of gondola cars were determined. Practical value. The generalization of theoretical, scientific and methodological, experimental studies aimed at further improving the technical and economic parameters of gondola cars are urgent when improving the body structure of the gondola cars. The above mentioned design features of the bodies of some models of modern gondola cars have practical value and can be used in further developments.Item Determination of Characteristics of Throttling Device for Pneumatic Spring(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2018) Reidemeister, Oleksii H.; Laguza, Anastasiia V.EN: Purpose. This paper focuses on determination of the dependence of the working medium flow on the capacity of the throttling device, its geometric features and the pressure difference in the pneumatic spring cylinder and in the auxiliary reservoir. Methodology. Calculation of the dependence of the working medium and pressure drop is performed in two ways: 1) by numerical simulation of a stationary gas flow through a throttling element; 2) its analytical calculation expression using empirical relationships (control calculation to evaluate the reliability of numerical simulation results). For the calculation, three models of throttling devices were chosen. Dependence of the flow rate of the working medium on the capacity of the throttling device and its geometric features was determined based on the approximation of the dependency graphs of the pressure drop against the mass flow rate of the working medium. Findings. We obtained graphical dependencies between the pressure drop and the mass flow rate of the working medium from the two calculation options. Based on the results of calculations performed with the help of a software package with visualization of the results, we calculated a proportionality coefficient that describes the dependence of the working medium flow on the throttling device capacity and its geometric features for each of the throttling elements considered, with three degrees of closure. The air flow values, obtained by numerical simulation, are greater than the flow rates obtained from semi-empirical formulas. At the same time, they are in good qualitative agreement, and the quantitative difference averages 25%, which can be regarded as confirmation of the reliability of the numerical model. Based on the calculation results, we plotted the proportionality coefficient graphs against the degree of closure of the throttling device. Originality. The work allows determining the degree of influence of the frictional component on the variation of the pressure difference in the pneumatic cylinder and the auxiliary reservoir of the pneumatic suspension system. Also, the work proposes a method to determine the dependence of the working medium on the capacity of the throttling device and its geometric features. Practical value. The ability to predict the operating parameters of the pneumatic system depending on the pneumatic resistance of the throttling device will improve the car running characteristics, increase the comfort of passenger transport, and also reduce the wear of the rolling stock and track gauge due to vehicle-track interaction.Item Determination of Dynamic Performance of Freight Cars Taking into Account Technical Condition of Side Bearers(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2013) Myamlin, Serhiy V.; Neduzha, Larysa O.; Ten, Oleksandr O.; Shvets, Angela A.EN: Purpose. The railway transport plays an important role in social and economic life of the country and carries out the large containment of transportation activities. The transport industry should migrate towards innovation changes and increase its significance as an important transit subsystem on the way of renovation of both the infrastructure and the strategy of all transportation process components including the interaction with other transport modes. At present the life sets strategic challenges for the railway branch, and the basic goals among them are as follows: high-speed train traffic development, increase of the weight of freight trains, new rolling stock development etc. Due to the urgency of this subject, the researchers should cope with the task devoted to one of aspects of improving the freight transportation efficiency, namely to the study of effects of various factors and characteristics of technical conditions of the freight cars running gears (which are unavoidable to arise during operation) on their basic dynamic indices. The deviations of technical conditions of running gears from the normal state of the wedge system of bogie swing suspension also play an important role among them. The purpose of the paper is to investigate the influence of different factors of the technical conditions of freight car running gears (size deviation in both the bearers and the wedge system during operation) on their basic indices – coefficients of horizontal and vertical dynamics, vehicle body acceleration, frame strength, and derailment stability coefficient. Methodology. The study was conducted by numerical integration and mathematical modeling of the freight car dynamic loading using the software package “Dynamics of Rail Vehicles” (“DYNRAIL”). Findings. As a result of the research for freight car dynamic coefficients determination taking into account technical conditions of the side bearers, the dependencies of the basic freight cars dynamic coefficients on the parameters of side bearers (the clearances in the side bearers and the wedge system conditions of the bogie swing suspension) considering running speed in the tangent and curved track sections of minor and mean radii were obtained. Originality. The impact of the technical condition of the car running gears on the traffic safety factors is determined. Practical value. The theoretical research results in determination of freight car dynamic indices taking into consideration the technical conditions of the side bearers of freight cars allow for an adequate assessment of effect of the freight car bogies’ technical conditions, namely the bearers parameters, on the railway traffic safety factors (coefficients of horizontal and vertical dynamics, vehicle body acceleration, frame strength and derailment stability coefficient).Item Determination of Stopping Distance of Unpowered Rolling Stock by Method of Sequential Braking(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Reidemeister, Alexey G.; Shaposhnyk, Vladyslav Yu.EN: Purpose. In the paper it is necessary to estimate the determination accuracy of a car stopping distance during the test by the method of sequential braking. The method of sequential braking is applied for experimental evaluation of the stopping distances. Unlike the abandonment method when a sample car is disconnected from the tractive connection and they record the stopping distance of a single car from the moment of uncoupling to the moment of stop, the method of sequential braking involves stopping distance measurement of the tractive connection, the integrity of which in the course of the test is not affected, but its set (locomotive, locomotive with the track test car or with a sample car) at the different stages of the test is changed. Direct measuring of the stopping distance of a sample car is not possible using this way, it requires calculating of the stopping distance values of the tractive connection. This adversely affects the accuracy of the result, but it can increase the safety level of the test. Methodology. To evaluate the accuracy researches have conducted the numerical experiment, which simulated experimental processing of stopping distance values. An error was found by giving disturbance of basic data (stopping distance of tractive connection of different configuration) and analyzing the resulted scatter of readings (stopping distance of a single car). Findings. The study proved: 1) the relative error of car stopping distances value, with relative error of basic data 1%, made 3.3-19.7% (depending on the tractive connection variant). 2) the proposed ways of error reduction (without track test car, less-weighed-locomotive use) allowed declining the error to 2.15-5.1%. Originality. The methodology of error estimation of car stopping distances determination under tests by the method of sequential braking was proposed. Practical value. Work results make it possible to replace the running brake tests by the abandonment method, under which the integrity of tractive connections is broken, with safer testing by the method of sequential braking, providing the level of result accuracy of 2-5%.Item Determination of the Dynamic Characteristics of Freight Wagons with Various Bogie(Taylor & Francis, 2015) Myamlin, Serhiy V.; Lingaitis, Leonas P.; Dailydka, Stasys; Vaičiūnas, Gediminas; Bogdevičius, Marijonas; Bureika, GintautasEN: In most cases, dynamic characteristics determine the wagon maintenance cycle, traffic safety, reliability and durability performance. The main dynamic indicators include the vertical Kvd and horizontal Khd dynamic coefficients as well as the stability coefficient Ks, which determines the wheel flange resistance to derailment. The article compares dynamic indications for three different types of bogies. There were no tangible differences observed for all the three different types of bogies running at a speed of 40 to 120 km/h on a direct tangent rail section. Nevertheless, there is a realistic potential to improve the dynamic indicators of a freight wagon by rationalising suspension unit parameters.Item Determination of the Filler Concentration of the Composite Material to Reduce the Wear of the Central Bowl of the Rail Truck Bolster(Elsevier BV, 2023) Baranovskyi, Denys; Myamlin, Sergey; Podosonov, Dmytro; Muradian, Leonty A.ENG: During the operation of freight cars, uneven wear occurs in the central bowl of the rail truck bolster. This article aims to determine the concentration of the filler of the composite material to reduce the wear of the central bowl of the rail truck bolster. In this work, for the first time, a mathematical model of the distribution of the filler concentration in the projected composite tape was obtained. To reduce the wear of the working surface of the central bowl of the rail truck bolster, as well as to ensure uniform wear distribution, it is proposed to weld a composite tape with variable tribomechanical properties using contact welding. The wear value of the working surface of the central bowl of the bolster of the rail truck bolster when using composite tapes of compositions Fe-Cr-Ni-Cr3C2 and Fe-Cr-Ni-TiC with contact welding was 0.15–0.18 mm per 10,000 km - for a loaded freight car and 0.08–0.10 mm per 10,000 km for an empty freight car. According to the amount of wear, the value of the service life of the center plate assembly is predicted, which is 320,000–420,000 km.Item Determination of the Filler Concentration of the Composite Tape(MDPI, 2022) Baranovskyi, Denys; Myamlin, Sergey; Bulakh, Maryna; Podosonov, Dmytro; Muradian, LeontyENG: For the first time, a theoretical dependence was obtained to determine the filler concentration of the composite tape. On the basis of this dependence, a composite tape with variable mechanical and tribological properties can be obtained. It is proposed that the composite tape is welded onto the cylindrical surface of the central bowl of the rail truck bolster. The bench tests made it possible to determine the degree of wear of the central bowl of the rail truck bolster by means of a welded composite tape. The wear value of the central bowl of the rail truck bolster with welded-on composite tapes is 0.15–0.18 mm per 10,000 km of a freight car’s mileage. The predicted service life of the central bowl of the rail truck bolster with a welded-on composite tape is 320–420 thousand km.Item Determination of the Risk of Failures of Locomotive Diesel Engines in Maintenance(MDPI, 2023) Baranovskyi, Denys; Bulakh, Maryna; Michajłyszyn, Adam; Myamlin, Sergey; Muradian, Leonty A.ENG: This article presents a mathematical model of the risk of failures, depending on the operating parameters, of locomotive diesel engines. The purpose of this study is to determine the risk of failures of locomotive diesel engines in maintenance. The theory of probability and the theory of logic and reliability are used in this theoretical study. The innovations and main works are the first approaches to calculating the risk of failures of locomotive diesel engines by hourly fuel consumption, which, under operational conditions, allows for extending the life of locomotive diesel engines during maintenance. As a result, a maintenance process for 5D49 diesel engines is developed in a locomotive depot. When managing the maintenance processes of 5D49 diesel engines in the locomotive depot, it is determined that the optimal mileage is 45,000 km. The resource of 5D49 diesel engines in the locomotive depot increased by 2.4% in the management of the maintenance process compared to the existing maintenance system.Item Determining the Causes of Rolling Stock Derailment From the Track Using Modern Research Methods(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kuzyshyn, Andriy; Batig, Andriy V.; Sobolevska, Julia H.; Kostritsa, Sergei A.; Ursulyak, Lyudmila V.; Dovhaniuk, Stepan S.EN: Abstract. The analysis of cases of rolling stock derailment from the track at PJSC «Ukrzaliznytsia» over the past 5 years has been carried out and their main types are given. It is noted that the rapid development and improvement of computer technology allows the use of computer and mathematical modelling in the study of cases of rolling stock derailment from the rail track, which makes it possible to take into account a combination of factors that have the main influence on the behavior of rolling stock when moving along the track. It has been established that the first step is the construction of a mathematical model of an object using a selected type of mathematical description: algebraic, differential, integral equations, discrete mathematics, set theory, and others. And the second step is the choice of a method for solving these models. The simulation methods are given, which, depending on the programming style, are divided into: procedural-oriented, object-oriented, logical-oriented, rule-oriented, and oriented to constraints. An objectoriented programming of a freight car has been developed, which will make it possible to evaluate its main dynamic indicators, in particular, indicators of stability from derailment. This in turn will facilitate the establishment of the main causes of rolling stock derailment from the rail track.Item Determining the Possibility of Using Removable Equipment for Transporting 20- and 40-Feet-Long Containers on an Universal Platform Wagon(Technology Center, Kharkov, Ukraine, 2021) Shaposhnyk, Vladyslav Yu.; Shykunov, Oleksandr A.; Reidemeister, Alexey G.; Muradian, Leontii A.; Potapenko, O.EN: An important role in the market of transport services belongs to container transportation. Railroads, especially under the conditions of increased competition from road transport, must respond quickly to the needs of the market and the growing demand for container transportation, including interstate traffic. Demand for container transportation can vary significantly during the year, which testifies to the expediency of introducing removable equipment on universal railroad freight cars that are involved in the deliveries of containers. This paper reports the design of a removable frame structure for a universal platform that could carry two 20-ft or one 40-ft container. The proposed technical solution does not require changes in the structure of the car and changes in its model; with a decrease in the demand for container transportation, it would allow this car to be used for its main purpose. According to the current methodology, the efforts that operate on the frame during the transportation of containers have been determined. The strength of the proposed structure was estimated by a finite-element method. The maximum stresses arising in the proposed structure are 164.4 MPa; they occur in the corners of the stops attached to the stand-up staples of the platform. The resulting stress values do not exceed the allowable ones. The results of calculating the removable equipment indicate its sufficient strength. Requirements for placing cargo on the rolling stock assume a mandatory check to fit the dimensions, which confirmed that the container hosted by the frame does fit them. The proposed structure makes it possible to abandon disposable fastening parts, improve the safety of container transportation, and increase competitiveness in the container transportation market.Item Development of Recommendations for Extending the Useful life of Passenger Cars(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Myamlin, Serhiy V.; Reidemeister, Alexey G.; Pulariia, Andriy L.; Kalashnyk, Volodymyr O.EN: Purpose. The vast majority of passenger car fleet of «Ukrzaliznytsia» have cars with outlasted service life. In this regard there is a need to find methods to justify the extending useful life of passenger cars and to assess the car body frame residual life conformity to the operating load for the next life time. Methodology. The selection of cars enforced technical diagnostics of cars to detect the level of corrosion and mechanical damage. The following steps provided the car body frame strength analysis on the basis of experimental static and impact strength tests, the longitudinal force effect endurance tests as well as assessment and forecasting of conformity of car body operating life for the next period. Findings The car survey before testing showed that the technical condition of sleeper cars (SSC) is better than that of open-type cars (SOC). So, in SSC cars the thinning of the main load-bearing elements due to corrosion does not exceed 10%, there are no cracks, deformations, rack breakages, etc. At the same time in SOC cars the thinning due to local corrosion reached 35%. There are deformations and corrosion damage of side sill Zshape of both cars, single corner post breakages, damage to the joints of longitudinal tie rod and span bolsters. The conducted static and impact strength tests with following strength assessment of the car structural members showed that the strength of the latter is provided according to the normative documents, and these cars pose no threat to traffic safety. The impact endurance tests showed that all the cars passed the endurance tests without damage, which would prevent from testing and could not be removed during the next depot repair or overhaul, and had life length that allows them to extend the useful life for the next period. Originality. The results of experimental studies show that passenger cars after 28 … 30 and 33… 35 years of operation meet the requirements of strength and safety in accordance with regulatory documents and allow, provided the impact endurance, reasonable extending of the car service life. Practical value. The part of the car fleet, which was to be written off based on the service life, may extend lifespan without additional measures.Item Development of Scientific School of Transportmechanics Artistic Legacy of Ye. P. Blokhin(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Myamlin, Serhiy V.; Kolesnykova, Tetiana O.ENG: Purpose. Development of domestic and global transport science occurred due to the contributions of many scientists and practicing engineers. The purpose of our study is the analysis of scientific documentary legacy of YE. P. Blokhin, Doctor of Technical Sciences, Professor of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan and identifying his place and role in the development of modern railway transport. Methodology. Application of problem-chronological, comparative, descriptive historical methods of research, systematization and analysis of scientific papers allowed the authors to submit the actual history of the railway transport development (1950-2013) through the prism of YE. P. Blokhin scientific activity. We identified 6 main periods of his scientific activity. Findings. It was found out that the overall intellectual plant of the scientist includes 555 scientific papers (written personally and co-authored) in domestic and foreign publications on key issues of mechanics and operation of railway rolling stock. Artistic legacy of YE. P. Blokhin includes monographs, articles, reports, patents, author certificate, etc. It was found that the epistolary legacy of scientist, archive materials, his personal diaries, reference list of works of his students and followers are almost unexplored. Originality. Authors of the work for the first time in the history of science and technology of Ukraine conducted a complex study of the scientific legacy of YE. P. Blokhin in the context of railway transport. It is proved that the ideas, research, scientific works, implemented projects, numerous students and followers of YE. P. Blokhin are important factors, confirming a significant contribution of the scientist to the global engineering and transport science. Practical value. The work can be used to create historiographical papers and textbooks, to study the issues of formation and development of the scientific school for transport mechanics and university science of Ukraine in the railway branch, in the course of lectures on the subjects «History of railway transport development» and «Introduction to the profession».Item Dynamic Performance of Freight Cars on Bogies Model 18-1711(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2013) Bubnov, Valerii M.; Myamlin, Serhiy V.; Mankevych, Mykola B.EN: Purpose. To analyze the results of study of dynamic parameters of the tank-car model 15-1900 and gondola car model 12-1905, equipped with the bogies model 18-1711 with axle loading of 25 ton and unified according to major parts and joints with the cars of previous generation. According to results of the study to conclude about the possibility of using bogies model 18-1711 as the running parts of the freight rolling stock of the new generation of 1520 mm track with increased axle loading. Methodology. The dynamic performance of the rolling stock running parts directly affects the safety of railway traffic. Experimental studies of the car dynamic qualities are an important step in the modernization of existing bogie constructions and in the creation of the new ones. These tests allow one to confirm the results of theoretical studies and to check the correctness of the constructive solutions. Findings. Basic results of dynamic studies are presented as the graphs of dynamic performance dependencies on the motion speed of the experimental train. Results show that the freight cars on the bogies model 18-1711 have satisfactory dynamic properties meeting current regulatory requirements. Originality. The dynamic characteristics of freight cars on bogies model 18-1711, which give a complete view of the car loading allow us to estimate the dependency of the car dynamic performance on the bogie design parameters. Practical value. The bogie model 18-1711 with axle loading 25 ton can be used as a freight car undercarriages of the new generation of 1520 mm track.Item Ecologic and Economic Means of Stabilization and Improvement of Environment State at The Railway Transport(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Zelenko, Yuliya V.; Myamlin, Serhiy V.EN: The problems of escalation of the ecological situation in the sphere and intensification of negative trends in many sections of transport technologies are conditioned by the proactive rate of transport development and peculiarities of its interaction with the objects of environment. Objective. The required stage of the modern approach to formation of effective system of ecological management at railway station is creation of special eco-informational system that will the possibility to give an objective evaluation of ecological and economic losses, both in the process of natural resource management and in cases of accidents with negative ecological consequences. Methodology. Development of environment management systems at organization of natural resources management on the base of modern information technologies will give the possibility not only to reduce the frequency of situations, associated with the environment elements pollution, but also to optimize organization of the natural resources management, as high concentration of resources may lead to emergency in adjacent regions of mutually exclusive types of anthropogenic activity. Scientific novelty and practical relevance. There is developed the system of the environment ecological state management is intended for definition of the best options for the natural resources management development with consideration of ecological and economical factors. In the process of development of the scientific bases of the transport ecological safety development, there was carried out the analysis of three main conceptual approaches to safety definition. It is proved, that in recent years, due to measurement of the danger level on the base of introduction of the relevant factor, the proposed scientific and methodological apparatus gives the possibilities of operative management of ecological and economic risks at the railway through constant monitoring with the help of the GIS technologies and system analysis.Item Estimation of Dynamic Qualities of Freight Wagons on Bogies of a Perspective Model(Silesian University of Technology, Poland, 2017) Myamlin, Sergej V.; Neduzha, Larysa O.; Lunys, OlegasEN: The work provides an analysis of the impact of bogies of different construction on the main dynamic indicators of movement safety of freight wagons, in the present case, of gondola wagons: coefficient of vertical dynamics of a body frame (Кd), coefficient of vertical dynamics of the unsprung bogie frame (Кdu), relation of the frame force to the static axial load (Nf/Pa), coefficient of the stability reserve against derailment (Кs) [5, 8-11, 15, 17]. Scientific novelty includes the experimentally obtained dependences of the main dynamic indicators of motion of gondola wagons with the use of Model 18-9771 bogies, having different variants of bearers, this giving an opportunity for choice of bearer parameters for receiving the highest effect as regards the reduction of dynamic loading both of the wagon and the track. Of practical value are technical decisions concerning fastening of the bearers to the bolster beam, which are under protection of the patent for invention [18, 20], and stiffness parameters of bogie bearers.