Статті КБМ
Permanent URI for this collection
ENG: Articles
Browse
Browsing Статті КБМ by Author "Myamlin, Serhiy V."
Now showing 1 - 7 of 7
Results Per Page
Sort Options
Item Construction Analysis of Mechanical Parts of Locomotives(The Lublin Branch of the Polish Academy of Sciences, 2013) Myamlin, Serhiy V.; Neduzha, Larysa O.; Lukhanyn, Mykola I.EN: To determine the dynamic properties of the mainline freight locomotives, characterizing the safe movement on straight and curved sections of track in the whole range of operating speeds, you need a set of studies including selection of design scheme, the development of an appropriate mathematical model of spatial fluctuations of the locomotive, making a computer calculation program, conducting the theoretical, and then experimental investigations of new designs. In this case, one should compare the results with existing constructions. One of the necessary conditions for improving the quality of traction rolling stock is to define the parameters of its running gears. Among the questions related to this problem, an important place occupies the problem of determining dynamic qualities of the locomotives at the stages of design, taking into account with the chosen technical solutions in the running gear design. The work focuses on key tendencies of some types of main locomotives embodiment, focusing on improving the running gears design. As a result of investigations one can see that the creation of a modern locomotive requires from designers and scientists realization of scientific and technical solutions providing the design speed increase with simultaneous improvement of the traction, braking and dynamic qualities to provide the simple and reliable construction, especially construction of the running gear, reducing the operating costs, low original cost and operating costs for the total service life, high traction force during take-off, work capability in the multiple traction mode, maximally approximated to the limited clutch and sufficient design speed. Research of mathematical modeling is conducted by the method of numerical integration of the dynamic loading of the main-line locomotive using the software system «Dynamics of Rail Vehicles» («DYNRAIL»). Design features of the running gear elements of some types of the main-line locomotives, which have inclined rods between bogie and the body, transmitting the traction forces between them and providing essential dynamic performance of the carriage motion are studied.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 Experimental Investigations on Operational Reliability of Diesel Locomotyves Engines(Polish Maintenance Society (Warsaw), 2012) Lingaitis, Leonas Povilas; Myamlin, Serhiy V.; Baranovsky, Denis М.; Jastremskas, VirgilijusEN: In work experimental researches of longevity and technical and operating parameters of diesel engine diesels are presented 10D100 with modified tribosystems. The last are instrumental in the rapid starting and decline of wear depending on time of starting, thus, such diesel practically on any speed and loading modes can be exploited without the promoted wear. At the modified shells of cylinders the wear of compression rings does not affect the size of breach of gases in carter. Thus, the modified tribosystems provide maximal longevity and providing of high technical and operating parameters of diesel engine.Item Experimental Research of Dynamic Qualities of Freight Cars with Bogies of Different Designs(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Myamlin, Serhiy V.; Ten, Oleksandr O.; Neduzha, Larysa O.EN: Purpose. With the advent of new designs of freright cars the task of designing the more modern bogies, assessment of their dynamic properties depending on the type and structure of pecularities, accounting the axle loadings, providing the dynamic and running characteristics, meeting the conditions of impact on the track, stability, and frame forces intensity etc. becomes especially important. In order to launch the new production into manufacture and to assess the dynamic properties using different designs of bogies the running testes were conducted. They allowed one to compare the dynamic performance of the new bogie with the existing models. Methodology. The study was conducted using the method of numerical integration and mathematical modeling of dynamic loading of freight cars using the software package «Dynamics of Rail Vehicles» («DYNRAIL»). Findings. The results of studies of dynamic characteristics of open cars with new and worn wheels of bogie models 18-9771, 18-9770 and 18-578 in graphical and tabular form are presented. All figures are within the normative values and do not exceed the maximum admissible ones. Originality. When designing the bogie for loading 23.5 t/axle almost all available technical solutions to improve the characteristics of the freight car bogies (elastic bearers, cassette bearing in axle boxes, axle boxe adapter of original design, bilinear central spring suspension, etc.) were used. Practical value. As a result of the engineering works on projecting and manufacturing of the improved designs of freight car bogies a new design was received. It is highly competitive with the dynamic qualities of the best ones. Made choice of rational values of elastic-dissipative parameters of the bogie allows one to create standard series of running gears for freight cars for promising operating conditions. The results are of practical importance. They have found reflection in the number of author’s publications in special and semi-popular editions.Item Mathematical Modeling of a Cargo Locomotive(2012) Myamlin, Serhiy V.; Dailydka, Stasys; Neduzha, Larysa O.EN: Actuality and explanation of development of six-axle mainline locomotive ER20CF for Lithuania Railways are done. For carrying out of theoretical researches with purpose of providing safety movement, strength of constructions elements, improved dynamical characteristics, was examined some aspects of mathematical simulation of dimensional hunting of freight locomotive.Item Research of Innovations of Diesel Locomotives and Bogies(Vilnius, Lithuania, 2016) Myamlin, Serhiy V.; Neduzha, Larysa O.; Urbutis, ŽilvinasEN: During manufacturing of diesel locomotives, their basic parameters must be adapted to the requirements of that specific environment. One of the central issues is the choice of bogies. The article present the examples of selecting a bogie by using multi-criteria optimization methods. The methods are adapted for Siemens bogies models SF1, SF2, SF3 and SF6. The solutions obtained by different methods were compared, and shortcomings of certain multi-criteria optimization methods for selection of a bogie model according to its parameters were established.Item Spatial Vibration of Cargo Cars in Computer Modelling with the Account of Their Inertia Properties(Kaunas University of Technology, Kaunas, 2010) Myamlin, Serhiy V.; Ten, Oleksandr O.; Neduzha, Larysa O.; Shvets, Anzhela O.EN: The papers describes some methods for more exact computation of the freight wagon's inertial characteristics, that is necessary for performing more exact computer simulation of the railway vehicle dynamics. Comparison of the simulation results with the test data shows the appropriate coincidence between them that confirms the mathematical model's adequacy.