Academic literature on the topic 'Underground railway rolling stock'
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Journal articles on the topic "Underground railway rolling stock"
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Oleksij, Fomin, Sulym Andrii, Kulbovskyi Ivan, Khozia Pavlo, and Ishchenko Vadym. "DETERMINING RATIONAL PARAMETERS OF THE CAPACITIVE ENERGY STORAGE SYSTEM FOR THE UNDERGROUND RAILWAY ROLLING STOCK." Eastern-European Journal of Enterprise Technologies 2, no. 1 (92) (2018): 63–71. https://doi.org/10.15587/1729-4061.2018.126080.
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An approach was proposed for determining rational parameters of the on-board capacitive energy storage for the underground railway rolling stock with recuperation systems. The essence of the approach is to determine the maximum power and energy intensity of the on-board CESS based on the analysis of the payback period of the storage systems. The main distinctive features of this approach include taking into account a number of operating conditions and technical features of the underground railway rolling stock. Using this approach, rational parameters of the on-board capacitive energy storage system for standard operating conditions of the experimental rolling stock with the recovery systems were determined at the Sviatoshyno ‒ Brovary line of the Kyiv Metropoliten. Based on the analysis of diagrams of the payback period of the chosen storage systems, it was established that for the given conditions of operation of the underground railway rolling stock, it is rational to introduce a capacitive storage with a maximum power of 1,000 kW and a working energy intensity of 3 kWh. It was calculated that for the given operating conditions, introduction of a storage system with rational parameters will save 16.1 % of the quantity of electric energy consumed for traction of the underground railway rolling stock
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Shashurin, Aleksandr, Konstantiv Fiev, Viktoriia Vasilyeva, and Andrey Voronkov. "DEVELOPMENT OF THE METHODOLOGY FOR MEASURING NOISE LEVELS IN THE UNDERGROUND ROLLING STOCK." VOLUME 39, VOLUME 39 (2021): 183. http://dx.doi.org/10.36336/akustika202139183.
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This document specifies the methodology for measuring equivalent sound pressure levels in octave frequency bands (in dB rel. 20 μPa), equivalent and maximum A-corrected sound levels (in dB rel. to 20 μPa), generated in the rolling stock in the driver’s cabins and in the passenger rooms of the salons, using acoustic meters - multifunctional analyzers Ecophysics, noise and vibration meters, spectrum analyzers Ecophysics 110A, Oktava 110A Eco, Oktava 110A, Oktava 111, B&K 2250, 2250L, 2270, noise and vibration analyzers ASSISTANT, noise and vibration meters, digital spectrum analyzers Algorithm-05, SVAN979. This methodology is applicable for noise measurements in the driver’s cabins and in the passenger rooms of the rolling stock of both new and old models operated by the underground railway.
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Bogdanov, Nikita, Yan Vatulin, Aleksandr Vorob'ev, and Kirill Sotnikov. "Use of numerical modeling in analysis of aeroelastic interaction of rolling stock with tunnel constructions." Bulletin of scientific research results 2024, no. 1 (2024): 65–73. http://dx.doi.org/10.20295/2223-9987-2024-01-65-73.
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Purpose of the work: study of the formation of a complex air structure under conditions of rolling stock movement along extended underground structures using numerical modeling methods. Methods: an analysis of the influence of aerodynamic factors on rolling stock, passengers and railway infrastructure was carried out based on the finite element and volume method. The reasons for the occurrence of a compacted air zone, which appears in front of the head car of the train and exerts significant resistance to the movement of the train using the “Frozen Rotor” method, have been investigated. The indicators of energy efficiency and safety of the process of freight and passenger transportation are analyzed, taking into account the processes of aerodynamic interaction of moving rolling stock and artificial tunnel-type structures. Results: using numerical modeling and the use of the “Frozen Rotor” method, it was possible to obtain a qualitative picture of the distribution of transverse vortex air flows resulting from the occurrence of viscous friction. Regularities were discovered in the changes in the dynamics of pressure and speed of air masses on the surface of the head fairing when a train enters a tunnel. The fact of the negative impact of zones of high and low pressure, as well as their sharp drop, on the locomotive crew and passengers has been established. Practical significance: the possibility of conducting research in the field of aerodynamics of railway transport using modern numerical modeling methods is shown. This topic is very relevant in the field of designing high-speed rolling stock.
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Fomin, Oleksij, Andrii Sulym, Ivan Kulbovskyi, Pavlo Khozia, and Vadym Ishchenko. "Determining rational parameters of the capacitive energy storage system for the underground railway rolling stock." Eastern-European Journal of Enterprise Technologies 2, no. 1 (92) (2018): 63–71. http://dx.doi.org/10.15587/1729-4061.2018.126080.
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Harris, N. G., and R. J. Anderson. "An international comparison of urban rail boarding and alighting rates." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 221, no. 4 (2007): 521–26. http://dx.doi.org/10.1243/09544097jrrt115.
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Although there is considerable engineering and demand planning analysis in the development of urban railways around the world, less attention is paid to the understanding of key operating conditions such as station stop times. The current paper takes forward research by London Underground, and shows that it is applicable to situations around the world without substantial changes in parameter values or the resulting passenger flow rates. Where passenger flow is substantially different, this can generally be explained by particular differences in the physical characteristics of the site, rolling stock, or passenger demand.
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Khvostik, M. Yu, and M. A. Starodubtseva. "Studies of the constructed rail seat supports." Vestnik of the Railway Research Institute 76, no. 6 (2017): 371–76. http://dx.doi.org/10.21780/2223-9731-2017-76-6-371-376.
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In recent decades, the use of constructed sleepers on the world's railways has been increasing: the United States, the EU countries, Japan and China. Such sleepers, having positive performance qualities of wooden sleepers (good elasticity and dielectric properties, manufacturability during laying and during repair work), do not have negative qualities of wood. The article reviews the US and EU standards for testing sleepers made of constructed materials. The classification of such sleepers is given. Examples of testing of such sleepers by specialists of JSC “VNIIZhT” for the period from 1999 to 2016 are given, including sleepers from modified wood, wooden sleepers with elastomeric coating, composite sleepers from recycled high-density polyethylene with glass-filled polymer. Features of the Russian requirements to the constructed sleepers are considered. Composite rail seat supports are promising in application. Possessing the advantages of wooden sleepers (bars), they have higher wear resistance, lower life cycle costs (recyclable), are more homogeneous and do not rot. Damping properties of composite sleepers contribute to solving the problem of reducing noise and vibration from rolling stock. In addition, their use is one of the ways to reduce the negative impact of rail transport on the environment. With a feasibility study, such sleepers will successfully replace other types of rail seat supports. Spheres of rational application of composite rail seat supports are heaving sections of the railway track, areas with weak soils, turnouts, tracks on bridges, railway tunnels, and underground tracks. Taking into account the tendency to expand the polygon for laying composite sleepers, including railway tracks, metro routes and land transport in the Russian Federation, Kazakhstan and other CIS countries, it is advisable to develop a single interstate standard containing safety requirements and test methods for constructed rail seat supports.
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Bogacz, Paweł, Łukasz Cieślik, Dawid Osowski, and Paweł Kochaj. "Analysis of the Scope for Reducing the Level of Energy Consumption of Crew Transport in an Underground Mining Plant Using a Conveyor Belt System Mining Plant." Energies 15, no. 20 (2022): 7691. http://dx.doi.org/10.3390/en15207691.
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One of the main elements that shape the production process in an underground mining plant is, in the broadest sense of the word, transport. Currently, a large amount of rolling stock from cable cars or suspended railways is maintained in mining plants, along with extensive infrastructure used for transporting crew and materials. The development of conveyor belt transport systems, as well as system process management, is increasing efficiency levels. Mining transport is a complex process, requiring large amounts of energy, which incurs significant production costs. We conduct a comparative analysis of the human transport system using a suspended railway with belt transport at Lubelski Węgiel “Bogdanka” Spółka Akcyjna (the largest hard coal mine in Poland), in terms of energy efficiency levels. We found that the process of transporting the crew in an underground mining plant to the production site using a conveyor belt system was less energy-intensive, and therefore created less emissions than the currently used model based on suspended queues. The analyses for the above project were conducted according to a model that was based on the study and analysis phase of the project through to its implementation and transfer to operational activities. The analysis was carried out based on the created simulation model, taking into account all elements of the crew transport process to and from the mining area. The implementation of the technical solution allowed for nearly a threefold reduction in the level of energy consumption and emissivity. In the analyzed model, the energy consumption in the first phase of production was 3.04 kWh per employee using the diesel rails system and 1.13 per employee using the belt conveyor system.
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Buyakova, Natalya, Vasiliy Zakaryukin, and Andrey Kryukov. "Mathematical modeling of electromagnetic environment at railroad junctions." E3S Web of Conferences 91 (2019): 01010. http://dx.doi.org/10.1051/e3sconf/20199101010.
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Results of computer-aided studies of electromagnetic environment at railroad junctions of alternating current electrified railroads having voltage of 25 kV are presented. A large number of lines and overhead catenaries significantly complicate the picture of electromagnetic field distribution. The nature of the field distribution in space is significantly affected by the rolling stock on station tracks. Besides, the task of electromagnetic environment modeling is complicated by the presence of underground pipelines and enclosures, and reinforced concrete passenger platforms. During the transfer of power of 10 + j10 MV·A through the junction of overhead system, the magnetic field strength at a level of 1,8 m is considerably less than the magnetic strength at a railway haul due to current distribution on overhead system of several tracks. Magnetic field strength levels in calculation examples do not exceed amplitude of 30 A/m. The train performance leads to changes in the strengths of the electrical and magnetic fields. The dynamics of changes is presented as a result of simulation modeling of train movement modes.
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Kurenkova, Galina V., and E. P. Lemeshevskaya. "Formation of working conditions and the problems of hygienic assessment of industrial environmental factors in railway tunnels." Hygiene and sanitation 95, no. 12 (2019): 1145–49. http://dx.doi.org/10.18821/0016-9900-2016-95-12-1145-1149.
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Tunnels are an integral part of the ways and artificial constructions of the railway. Objective assessment of working conditions is important, because current regulations fail to allow to give a definite hygienic assessment of some factors of the production environment of the tunnels. Objective: to reveal the peculiarities of the formation of working conditions in railway tunnels with the subsequent hygienic assessment for the development of preventive measures. Measurement of the factors of working process and working environment is carried out with the use of the certified equipment for the approved the hygienic and sanitary-chemical methods in workplaces in tunnels of the East-Siberian railway. Specific conditions were shown to be formed due to constructive solutions, climate and geographical location, the length of railway tunnels, the composition of the rocks through which the tunnel, the nature of the maintenance tunnels, ventilation system, repetition rate and type of passing rolling stock. All employees from occupational groups from examined tunnels were established to be exposed to high concentrations of aerosols with predominantly fibrogenic action, noise levels, adverse climate (low positive and negative temperatures, high relative humidity and mobility of air), the lack of natural lighting, low levels of artificial light, hard exertion of labor (dynamic physical load, working position, the slopes of the body, movement in space). Additionally, high levels of the vibration, nonionizing and ionizing radiation were typical for jobs of the Baikal and the North-Muya tunnel. There is proposed the algorithm of hygienic assessment of the microclimate, light environment at the working places depending on the time of the works in the underground conditions and constructional features of tunnels, methods of accounting personnel dose rates from natural sources.
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Borisov, Stanislav, Ekaterina Koltunova, and Sergei Kladiev. "Traction asynchronous electric drive of mine electric locomotivesimulation model structure improvement." Journal of Mining Institute 247 (March 16, 2021): 1–8. http://dx.doi.org/10.31897/pmi.2021.1.12.
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The article discusses the solution to the problem of underground railway transport slipping in dynamic modes, which occurs when there is a significant difference in the speeds of the driving and driven pairs of wheels. The state of the rail surfaces largely determines the coefficient of adhesion, therefore, using a mathematical model, the condition for the dependence of the magnitude of slipping and tractive effort is selected. For effective acceleration and deceleration of an electric locomotive, it is necessary to control the coefficient of adhesion at a certain level. A simulation model of rolling stock has been created, which for the first time takes into account a mechanical system with distributed parameters. In the structural diagram of the automatic control system of traction electric drives with frequency regulation, such factors as the volume of goods being moved, rolling friction, slope (rise) levels and the state of the rail track are taken into account. The simulation results show the features of the movement and stops of the freight train not only by the diagrams of speed and forces in the modes of acceleration-deceleration and uniform movement, but also the positions of the plungers and tractive forces on the couplings of the electric locomotive and all trolleys involved in the movement of goods. The practical application of the proposed method lies in the possibility of starting a heavily laden train from its place on the ascent section in conditions of insufficient adhesion coefficient with contaminated roads.
Dissertations / Theses on the topic "Underground railway rolling stock"
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Vycpálková, Šárka. "Analýza světového trhu železničních vozidel." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-5507.
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This thesis analyses the world rolling stock market. It was written on claim of SKF Group. It contains the information about segmentation, status and development of the market. Moreover there is also basic information about transport and railway technology market.
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Conradie, Pieter Daniel Francois. "Quantifying system reliability in rail transportation in an aging fleet environment." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96836.
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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: In recent years, the management of physical assets has become increasingly important, even more so, in
asset intensive organisations. This research work presents an overall approach to quantify reliability of
rolling stock assets in the rail environment. The current maintenance management system in the case
studied is over-reliant on cancellations and delays as reliability measure. The objectives of this study
were, therefore, to develop a scientific approach to quantify the reliability of the rolling stock fleet and
to develop a maintenance planning model based on system reliability. The research methodology
followed made use of failure statistics, failure distributions and the interdependence of different systems
to determine the impact of component failures on the overall system reliability. This could then be used
to determine the reliability of individual train sets in order to better understand their performance. The
reliability measure could be used for predicting component and train set failures as well as to better
understand the contribution of maintenance towards reliability, hence the term Reliability Based
Maintenance. The model, validated with real data, illustrates how the reliability measure can be used to
determine maintenance intervals of different train sets. Based on the results, recommendations are made
in relation to future planning of the maintenance strategy.<br>AFRIKAANSE OPSOMMING: Die bestuur van fisiese bates het in die afgelope tyd meer belangrik geword, veral in organisasies wat
afhanklik is van hulle fisiese bates. Hierdie navorsing stel ‘n metode voor wat die betroubaarheid van
rollende materiaal bates in die spoor bedryf kwantifiseer deur gebruik te maak van falingstatistiek. In
die huidige instandhouding bestuurstelsel van die gevallestudie word daar te veel gesteun op kansellasies
en vertragings van treine as ‘n betroubaarheids meting. Daarom was die doelwitte van die navorsing om
‘n wetenskaplike benadering te ontwikkel om betroubaarheid van rollende materiaal the kwantifiseer,
en om ‘n instandhouding beplannings model voor te stel, gebaseer op sisteem betroubaarheid. Die
navorsingsmetodologie is gebaseer op falingstatistieke, falingverspreidings, en die interafhanklikheid
van stelsels word gebruik om die invloed van komponent falings op die betroubaarheid van die totale
stelsel te bepaal. Hierdie benadering word dan gebruik om die betroubaarheid van individuele treinstelle
en die werksverrigting van individuele trainstelle te bepaal. Hierdie instandhouding meting kan gebruik
word om falings van komponente en treinstelle te voorspel, asook om die bydrae van instandhouding
tot betroubaarheid beter te verstaan, daarom genoem Betroubaarheids Gebaseerde Instandhouding. Dit
is ook geïllustreer hoe die betroubaarheid meting gebruik kan word om instandhouding intervalle te
bepaal. Die betroubaarheid model is met werklike data gevalideer en aanbevelings word gemaak hoe
om betroubaarheid te gebruik om die toekomstige beplanning van instandhouding te doen.
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Montvidienė, Kristina. "Traukos riedmenų įsigijimo terminų AB „Lietuvos geležinkeliai“ prognozavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050616_150451-44570.
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In this work are present analysis of traction rolling – stock in Lithuania. There are traversed main criterias of 2M62 series lokomotyve of Radviliškis lokomotyve depot – expenses of maintenance and outlays of fuel, oil, unplanned repairs, running repairs ER-1 and technical handling TP-3.According to complex quality rate is determined critical technical state of traction rolling-stock. There is designed expedient technique of selection of traction rolling-stock and terms of purchase, invoking which we could get maximum economical effect.Inferences are present in the end of this work.
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Santos, Alexandre Facini dos. "Gerenciamento da confiabilidade em projetos de material rodante ferroviário." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-10012008-103534/.
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É cada vez maior a demanda pela eficiência dos sistemas ferroviários. A confiabilidade do material rodante é um dos fatores de desempenho mais importantes para a eficiência global dos trens de passageiros. Para que índices satisfatórios de confiabilidade, disponibilidade, mantenabilidade e segurança (CDMS) sejam alcançados, deve-se considerar esses fatores desde a elaboração da especificação técnica do material rodante até a operação da frota, incluindo projeto, fabricação, testes, comissionamento e garantia. No presente trabalho foram pesquisados os principais requisitos, normas e boas práticas empregadas na indústria ferroviária mundial para o gerenciamento da confiabilidade em projetos de material rodante, levando-se em conta os aspectos práticos e científicos. Para isso, foram inicialmente apresentadas algumas especificidades do setor ferroviário assim como alguns dos principais tipos de veículos ferroviários e seus sistemas, para que se tenha uma visão geral do contexto em que o trabalho está inserido. Em relação ao gerenciamento de CDMS propriamente dito, são mencionadas as principais tarefas a serem realizadas, de acordo com as referências consultadas. Foi dada uma atenção especial às especificações técnicas de CDMS, levando-se em conta a classificação das falhas e a determinação de parâmetros contratuais. Também foram abordados os aspectos teóricos e práticos das principais ferramentas e métodos de análise de CDMS empregados, tais como alocação de metas, predição de confiabilidade, diagrama de blocos, FMECA, FTA, monitoramento da confiabilidade em campo, etc.<br>Demand for efficiency in railway systems is increasing through the years. Rolling stock reliability is one of the most important performance factors for the global efficiency of passenger trains. To attain satisfactory reliability, availability, maintainability and safety (RAMS) figures, these factors must be considered from the elaboration of rolling stock technical specifications up to the operation of the fleet, including design, manufacturing, tests, commissioning and warranty. In the present work a research on main requirements, standards and good practices applied in worldwide railway industry for managing reliability in rolling stock designs was carried out, taking into account practical and scientific aspects. Some specificities of railway industry as well as some of the main railway vehicles types and related systems were presented, so that one can have an overview of the context where this work is inserted. Related to RAMS management, the main tasks to be done are presented, according to the references. Special attention was paid to RAMS technical specifications, considering failure classifications and determination of contractual parameters. The theoretical and practical aspects of the main tools and analysis methods of RAMS applied to the rolling stock design, such as apportionment of targets, reliability predictions, reliability block diagrams, FMECA, FTA, monitoring of field reliability, etc., were also covered.
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Bubnov, Valeriy, Serhiy V. Myamlin, Nikolay Mankevych, Сергей Витальевич Мямлин, and Сергій Віталійович Мямлін. "Theoretical and Experimental Investigations of Strength Properties of Cast Parts for Freight Cars Bogie with Axle Load of 245 kN." Thesis, Вильнюс, Литва, 2013. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/2083.
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Bubnov, V.
Theoretical and experimental investigations of strength properties of cast parts for freight cars bogie with axle load of 245 kN / V. Bubnov, S. Myamlin, N. Mankevych // Transbaltica 2013 : Proceedings of the 8th International Scientific Conference. May 9-10, 2013 / Vilnius Gediminas Technical University. - 2013. - P. 9-12.<br>EN: The cast parts of bogies for freight cars are most loaded elements, which are subject to special requirements
in view of the fact that their technical condition directly affects the safety of traffic. The most stressed parts of
bogies include side frames and bolster. The paper describes the results of the calculation, static and fatigue strength
tests of bolster and side frame for freight car bogie model 18-1711 with axel load of 245 kN. Structural analysis was
made based on allowable stress and the safety factor of fatigue strength. Analysis of the results of the calculation,
static and fatigue testing results proved that design of side frame and bolster comply with all normative documents.
The result of the complex theoretical and experimental investigations have provided confirmation of the selected constructive
solutions bolster and side frame for bogie with a axle load 245 kN, which confirms the possibility of their
use in the manufacture of freight cars.<br>LTD “GSKBV” (PJSC “Azovmash”
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Губар, Олексій Васильович, Алексей Васильевич Губарь, Alexei V. Gubar та Aleksey V. Gubar. "Обґрунтування норм улаштування та утримання колії для кривих з радіусами менше 350 метрів". Thesis, Видавництво Дніпропетровського національного університету залізничного транспорту імені академіка В. Лазаряна, 2011. http://eadnurt.diit.edu.ua/jspui/handle/123456789/757.
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Губар, О. В.
Обґрунтування норм улаштування та утримання колії для кривих з радіусами менше 350 метрів : авт. дис. к. т. н.: 05.22.06 / О. В. Губар ; Дніпропетр. нац. ун-т залізн. трансп. ім. акад. В. Лазаряна. - Д., 2011.<br>UA: АНОТАЦІЯ. Дисертація присвячена обґрунтуванню норм улаштування та утримання колії для кривих з радіусами менше 350 м шляхом впровадження конструкції рейкових скріплень з можливістю складання та регулювання ширини колії у як в межах кругових, так і перехідних кривих для типових залізобетонних шпал.
Розроблено математичну модель взаємодії рухомого складу і колії та програмне забезпечення, які дозволили в дисертації встановити раціональні обґрунтовані норми ширини колії та розробити технологію складання колії з залізобетонними шпалами. Надано методики суцільного і локального регулювання ширини колії зі скріпленням СКД65-Б.
Отримані теоретичні й практичні результати використано в розробці конструкції колії на залізобетонних шпалах для кривих ділянок радіусом
менше 350 м.<br>RU: АННОТАЦИЯ. Диссертация посвящена обоснованию норм устройства и содержания пути для кривых с радиусами менее 350 м путем внедрения конструкции рельсовых скреплений с возможностью устройства и регулирования ширины колеи как в пределах круговых, так и переходных кривых для типовых железобетонных шпал.
Выполнен анализ материалов расследования сходов подвижного состава. Установлено, что основная часть сходов имеет место на станциях в кривых с радиусом менее 350 м при выполнении маневровых работ. В большинстве случаев сходили с рельсов локомотивы с трехосными тележками.
Существующие на сегодня нормы ширины пути в кривых участках рассчитанны исходя из условий вписывания жесткой базы массового железнодорожного экипажа. Расчеты обоснования этих норм разрабатывались с учетом наличия, на то время, в вагонном парке длиннобазных двухосных вагонов и грузовых вагонов с трехосными тележками.
При массовом внедрении железобетонных шпал норма ширины колеи на прямых и кривых при радиусе 300 м и больше на железобетонных шпалах установлена одинаковой, равной 1520 мм. Область применения железобетонных шпал ограничена величиной радиуса из-за необходимости обязательного расширения ширины колеи в кривых участках меньших радиусов.
На сегодняшний день как на железных дорогах Украины, так и стран
СНГ отсутствуют обоснованные нормы устройства пути на железобетонных шпалах в кривых участках пути с радиусами круговых кривых менее 350 м.
Такие обоснования отсутствуют, в первую очередь, из-за того, что отсутствуют конструкции пути, которые отвечали бы требованиям для таких кривых, а именно возможностью устройства пути с заданной и обоснованной шириной колеи в пределах круговой кривой и обеспечения отвода расширения в пределах переходных кривых. Кроме того, такая конструкция должна предусматривать возможность регулирования ширины колеи, которая изменяется в процессе эксплуатации.
Вопросом возможности внедрения железобетонных шпал в кривых участках с радиусами менее 350 м непрерывно занимались еще с 70-тых годов прошлого столетия. Как результат – в круговых кривых с радиусами от 200 м до 450 м было разрешено укладывать специальные железобетонные шпалы (типа Ш-6) с нормой ширины колеи 1535 мм, но опыт их эксплуатации оказался достаточно неудачным, из-за отсутствия как возможности регулирования ширины колеи, так и отсутствия возможности создания отвода ширины колеи в пределах переходных кривых.
Автором разработана конструкция рельсовых скреплений для типовых железобетонных шпал (Ш-1, Ш-6), что дает возможность устройства и регулирования ширины колеи в кривых участках любого радиуса как в пределах круговых, так и переходных кривых. Эта конструкция прошла опытную эксплуатацию на сети железных дорог Украины и введена в постоянную эксплуатацию приказом Государственной администрации железных дорог Украины.
В настоящее время при отсутствии длиннобазных двухосных вагонов и вагонов с трехосными тележками в вагонном парке и наличием разработанной автором конструкции, что позволяет собрать путь с шириной колеи до 1535 мм (1540 мм со шпалами типа Ш-6) появилась техническая возможность установления и регулирования ширины колеи в кривых, где необходимое ее расширение. Это вызывает необходимость обоснования норм устройства и содержания колеи для кривых с радиусами менее 350 м.
О необходимости таких норм для железобетонных шпал в кривых участках пути с радиусами кривых менее 350 м свидетельствует количество деревянных шпал, уложенных в путь и которые могут быть заменены на железобетонные шпалы. Например, на Львовской железной дороге уложено 4 млн. 554 тыс. деревянных шпал что составляет 48 процентов от общего количества шпал, а на остальных железных дорогах доля деревянных шпал составляет от 22 до 30 % от их общего количества. Больше всего деревянных шпал имеют так называемые горные дистанции, где много кривых радиусом менее 350 м. Кроме того, фактический срок службы железобетонных шпал отвечает расчетному и складывает около 40 лет, а фактический срок службы деревянных шпал составляет около 7–7,5 лет, что в 2–2,5 раза меньше от расчетного. Основная причина сокращения срока службы связана с механическими повреждениями древесины в результате частых перешивок рельсовых нитей. По этой причине 33 процента деревянных шпал непригодны для дальнейшего использования. Кроме того, закупки деревянных шпал ограничены малым объемом предложений от поставщиков, из-за чего шпал катастрофически не хватает не только для проведения плановых, но и текущих ремонтов.
Разработана математическая модель взаимодействия подвижного состава и пути и программное обеспечение, которые позволили в диссертации установить рациональные обоснованные нормы ширины пути и разработать технологию устройства и содержания пути с железобетонными шпалами.
Полученные теоретические и практические результаты использованы в разработке конструкции пути на железобетонных шпалах для кривых участков радиусом менее 350 м и использованы в нормативно-техническом документе Укрзализныци «Инструкция по устройству и текущему содержанию пути со скреплениями типа СКД65» ЦП-0199.<br>EN: ANNOTATION. The present thesis grounds the standards of conformation and maintenance of track for curves with radiuses less than 350 m by introducing the rail clips device with the option of setting railway gauge within the ambit of both circular and transition curves for typical concrete ties. The mathematical model of interaction of rolling stock and track and the software that allowed setting properly grounded standards of railway gauge and developing the technology of conformation and maintenance of track with concrete ties are worked out in the thesis. Methods of general and local adjustment of railway gauge with the help of СКД65-Б rail clip are given. Theoretical and practical educts were used in the development of conformation of track with concrete ties for curves with radiuses less than 350 m.
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Lucas, Rémi. "Planification adaptative des ressources ferroviaires." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. https://theses.hal.science/tel-03009036.
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La planification ferroviaire consiste à établir en amont des circulations un plan de transport spécifiant l’emploi du temps de chaque ressource : les sillons, qui correspondent aux horaires des trains, les matériels roulants devant assurer leur circulation, ainsi que les agents à bord de ces trains. Compte tenu de la complexité du système ferroviaire, cette planification est effectuée potentiellement plusieurs années à l’avance, où un plan de transport précis est établi.Or, une fois qu’une ressource a été planifiée, il est parfois nécessaire d’adapter le plan de transport et donc de le changer. Les raisons peuvent être multiples : changement horaire pour causes de travaux, infrastructure partiellement endommagée, demande d’une rame supplémentaire pour un train, avarie sur un type de matériel roulant… Ainsi, le plan de transport est parfois adapté à plusieurs reprises entre sa conception potentiellement plusieurs années à l’avance et son exécution le jour des circulations. Dès lors, il est légitime de se demander si la conception d’un plan de transport précis avec des échelles de temps aussi importantes est raisonnable.Dans cette thèse, nous envisageons d’ajouter de la flexibilité dans le processus de planification, afin que les efforts déployés pour adapter le plan de transport lorsque cela est nécessaire soient réduits. Nous introduisons la notion de coûts d’adaptation du plan de transport, et nous proposons d’expliciter ces coûts d’adaptation pour le matériel roulant. Nous précisons notamment les coûts d’adaptation structurels, qui permettent de quantifier les similitudes entre deux planifications différentes du matériel roulant. La planification adaptative telle que nous l'envisageons consiste alors à anticiper dès la phase de conception les futures adaptations possibles du plan de transport. Plusieurs modèles de Programmation Linéaire en Nombres Entiers sont introduits et des résultats expérimentaux sont proposés sur des instances réelles issues de SNCF. L'approche de planification adaptative a pu être comparée à l'approche actuelle, et on montre que les coûts d'adaptation du plan de transport peuvent être effectivement réduits en adoptant cette nouvelle façon de planifier<br>Railway planning consists of drawing up a transportation plan before operational time, specifying a planning for each resource: the train paths, which correspond to the schedules, the rolling stock that will be used to move the trains, and the crew on board the trains. Given the complexity of the railway system, this transportation plan is carried out potentially several years in advance, when a precise transportation plan is drawn up.However, once a resource has been planned, it is sometimes necessary to adapt the transportation plan and therefore change it. There may be many reasons for this: schedule changes due to work, partially damaged infrastructure, request for an additional train set for a train, damage to a type of rolling stock, etc. Thus, the transportation plan may sometimes be adapted several times between its design, potentially several years in advance, and its execution on the day of traffic. It is therefore legitimate to ask whether the design of a precise transport plan with such large time scales is reasonable.In this thesis, we consider the adding of flexibility to the planning process so that the effort to adapt the transportation plan when necessary is reduced. We introduce the notion of transportation plan adaptation costs, and we propose to make these adaptation costs explicit for the rolling stock resource. In particular, we specify the structural adaptation costs, which make it possible to quantify the similarities between two different rolling stock plannings. Adaptive planning consists in anticipating possible future adaptations of the transport plan as early as the design phase. Several Integer Linear Programs are introduced and experimental results are proposed on real SNCF instances. The adaptive planning approach can be compared with the current approach, and it is shown that the adaptation costs can be effectively reduced by adopting this new way of planning
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Панченко, Петро Володимирович, Петр Владимирович Панченко та Peter V. Panchenko. "Обґрунтування норм утримання залізничної колії у плані при прискореному русі". Thesis, Видавництво Дніпропетровського національного університету залізничного транспорту імені академіка В. Лазаряна, 2014. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/2013.
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Панченко, П. В. Обґрунтування норм утримання залізничної колії у плані при прискореному русі : авт. дис. к. т. н. / П. В. Панченко ; Дніпропетр. нац. ун-т залізн. трансп. ім. акад. В. Лазаряна. - Д. : Вид-во Днiпропетр. нац. ун-ту залізн. трансп. iм. акад. В. Лазаряна, 2014. - 20 с. : іл., табл.
ГРНТИ 73.29.11 УДК 625.1.032.43(043.3)
Захист - 06.03.2014<br>UK: АНОТАЦІЯ Дисертаційна робота присвячена теоретичним та експериментальним дослідженням з розв'язання важливої науково-технічної задачі з розробки нормативів утримання колії у плані при швидкостях руху поїздів 140-160 км/год (прискорений рух).
У роботі проаналізовано історичний розвиток нормативів утримання колії. Визначено, що до 2012 року нормативи утримання колії у плані були отримані для швидкостей руху 140 км/год і повинні бути удосконалені у зв’язку з підвищенням швидкостей руху з 140 до 160 км/год.
Удосконалена нелінійна багатомасова математична модель для дослідження взаємодії колії з пасажирським вагоном на візках КВЗ-ЦНИИ. Виконано якісну та чисельну верифікацію математичної моделі з даними експериментальних досліджень. Виявлено достовірність теоретичних розрахунків.
Проаналізовано експериментальні дослідження і виявлено дію рухомого складу на колію та комфорт їзди пасажирів. Визначено, що горизонтальне прискорення (імпульсне), що діє на пасажира під час руху, залежить від геометричних показників нерівностей колії у плані, від радіуса кривої та швидкості руху і є обмежуючим критерієм при розробці нормативів утримання колії у плані.
Обґрунтовано та розроблено норми та допуски утримання колії у плані при швидкостях руху 140-160 км/год, які впроваджені і діють на залізницях України.<br>RU: АННОТАЦИЯ Диссертация посвящена теоретическим и экспериментальным исследованиям решения важной научно - технической задачи по разработке нормативов содержания пути в плане при скоростях движения поездов 140-160 км/ч (ускоренное движение).
В работе проанализированы историческое развитие нормативов содержания пути. Определено, что до 2012 года нормативы содержания пути в плане были получены для скоростей движения 140 км/ч и должны быть переработаны в связи с повышением скоростей движения со 140 до 160 км/ч.
Усовершенствована нелинейная многомассовая математическая модель для исследования взаимодействия пути с пассажирским вагоном на тележках КВЗ-ЦНИИ. Усовершенствована нелинейная многомассовая математическая модель для исследования взаимодействия пути с пассажирским вагоном на тележках КВЗ-ЦНИИ, в которой одновременно учтено: вертикальную массу и жесткость пути; горизонтальную массу и жесткость пути; работу наклонного гасителя колебаний в вертикальной и горизонтальной поперечной плоскостях от вертикальных и горизонтальных перемещений рамы тележки и надрессорной балки; работу ограничителей поперечных перемещений надрессорной балки относительно рамы тележки; работу ограничителей поперечных перемещений рамы тележки относительно колесной пары; пространственные геометрические нелинейности взаимодействия тел, определенных нелинейными зависимостями деформаций от угловых координат; двухточечный контакт колеса с рельсом; пространственное положение рельсов в кривых и прямых участках пути в единой системе координат.
Усовершенствованная математическая модель позволяет получить и проанализировать более точно: координаты и скорости тел в соединительных элементах системы экипаж путь, перемещения и скорости перемещений силовых элементов, деформаций, проскальзывание и силы на поверхности катания и гребня колеса в контакте колесо-рельс.
Проведено качественную и численную верификацию математической модели с данными экспериментальных исследований. Выявлено достоверность теоретических расчетов.
Усовершенствована методика проведения экспериментальных исследований. Усовершенствование заключается в рациональном определении мест положения датчиков на пути для исследования ее напряженно деформированного состояния по результатам натурных измерений пространственного положения пути и математического моделирования взаимодействия ее с подвижным составом.
Для проведения многовариантных расчетов взаимодействия пути и пассажирского вагона на тележках КВЗ-ЦНИИ при скоростях движения 140-160 км/ч были проведены эксплуатационные исследования по определению геометрических параметров состояния пути в плане в кривых и прямых участках пути. Геометрические параметры неровностей пути в плане (амплитуда и длина неровности) были определены по результатам промеров путеизмерительного вагона.
Проанализированы экспериментальные исследования и выявлено действие подвижного состава на путь и комфорт езды пассажиров. Определено, что горизонтальное ускорение (импульсное), действующее на пассажира во время движения, зависит от геометрических показателей неровностей пути в плане, от радиуса кривой и скорости движения и является ограничивающим критерием при разработке нормативов содержания железнодорожного пути в плане.
Обоснованы и разработаны нормы и допуски содержания пути в плане при скоростях движения 140-160 км/ч, которые внедрены и действуют на железных дорогах Украины.<br>EN: ABSTRACT The dissertation is devoted to the development of norms and regulations of railway track maintenance at traffic speeds from 140 to 160 km/hour. In connection with European integration and the necessity of railway traffic speed increase there is an urgent problem of the development of new norms and regulations on railway track maintenance.
Dissertation work consists of four basic sections. The problems of track geometry influence on passenger travel, methods of field experiments conduct with the traffic speed more than 140 km/hour, the problems of theoretical modeling of track and rolling stock interaction and others are considered.
The scientific novelty of dissertational work is in the improvement of mathematical model of carriage interaction with the track that gives the crew the possibility to model the movement on elastic way with various geometry.
Besides, the technique of track position modeling is improved as a result of field measurements, which allow defining the number of measuring devices and their position on the track. For the first time, the passenger comfort and trains safety were analyzed depending upon the track geometry with the speed traffic more than 140 km/hour.
The given work has wide practical application at railways of Ukraine. According to its results the Norms and Regulations of Railway Track Maintenance have been developed and introduced into Ukrainian railway documentation
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Chien, Ming-Hung, and 錢明鴻. "Simulation Analysis of the Correlation between Noise and Vibration for Railway Rolling Stock." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/22271340259653474049.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>98<br>Many studies have been indicated that the noise and vibration are closely related for the railway system. The objective of this study is to investigate the rolling noise of a high-speed rail vehicle by developing a simulation model using the available vehicle parameters and track parameters. Numerical analysis method was adopted to develop a vehicle-track coupling theory model. To simulate the dynamic response of running railway vehicle, different running condition and adhesion coefficient, as well as measured rail irregularity were applied. The dynamic responses were converted to the noise level by using equation of vibration dose values (VDV) and sound exposure level (LAE). The non-linear regression analysis is applied to obtain a fitting equation between the vibration acceleration and noise. The fitting equation indicates that the vibration acceleration and noise have a logarithmic relationship. Therefore the rolling noise level can be predicted by this fitting equation.
The simulation results show that there are some factors such as the suspension system, the shape of contact area, rail irregularity and adhesion coefficient have significant impact on rolling noise. Among those factors, the rail irregularity has the major contribution to the railway vehicle rolling noise. The sensitivity of rail pad stiffness to the rolling noise is also conducted by this research. Through an appropriate design of suspension system, the rolling noise of rolling stock can be reduce to the anticipate level.
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SUNG, HUNG-KANG, and 宋鴻康. "Application of Trains Operation Strategy in Energy Saving Research of Taiwan Railway Rolling Stock." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/63qd39.
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博士<br>逢甲大學<br>電機與通訊工程博士學位學程<br>107<br>In view of the global energy crisis and the increase of environmental protection, each country all have the issue of energy conservation and carbon reduction. Taiwan is no exception due to the suspension of the construction of the No. 4 nuclear power plant, the Shen-Ao and Tai-Chung coal-fired power plants, and electric power shortage will be gradually rising. Finding source and reduction have become important policies of the government. Rail transportation undoubtedly is great option for mass transportation. However, Rolling Stock is the huge energy-consuming. The electrical railways include high-speed rail, convention Railway, and metro. Reduction or regenerative brake is the main direction of this research.
The rapid and mass transportation of intercity has always been an important transportation for domestic transportation. Taiwan Railways Administration (TRA) first electrified in 1978. Nowadays TRA increased number of trains operation and huge energy consumption as well. This study uses Social Spider Algorithm establishes the energy use formula for the train operation of Taiwan Railway, and calculates the overall energy consumption and resistance parameters for the energy use and resistance of the train State, different energy usage analysis for different train performance and route status input, because the energy consumption of the new generation of smart trains is significantly different from that of the old type electric Rolling Stock. Therefore, train operating conditions and energy consumption patterns can be used to distinguish them into three states for analysis, which are acceleration, costs and deceleration, and analyze the energy of the whole process because of different train operation modes and railway ramp parameters. Changes, energy consumption will be affected by many factors, in order to reduce energy consumption, the optimize train energy consumption formula algorithm, and then optimize the results with fast calculations, and then such results put into the train propulsion soft, can reduce the excess energy consumption and error caused by human operation, and can reach the destination on time. By using the energy consumption formula and train parameters, not only can the reduced energy, but also the train can arrive in time. .
This study mainly uses the "Application of Social Spider Algorithm (SSA) to Optimize Energy of Train” to simulate the predatory behavior of social spider, that is, the vibration intensity transmitted through the prey in the spider web, and then statistically grasp the most abundant food position etc. The optimize solution suitable for efficient train acceleration. At the same time, in the calculus model, the behavior pattern of random movement is added, so that the novel algorithm can have an approach for the track segment and increase the possibility of the optimal solution. In support of the feasibility of the proposed method in this study, the simulated using the TRA train and compared with the actual measured values. According to the actual measurement results, the method proposed in this study does have the application potential of the train energy-saving operation plan, and should provide a reference for the driver's operation. At the same time, this study is also compared with the teaching-learning-based optimization, Teaching-learning-based optimize (TLBO) algorithm to prove the superiority of this method, to solve the best train energy-saving operation of energy use, and also to ensure the running time of the train in order to move towards high-performance trains.
Books on the topic "Underground railway rolling stock"
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Institution of Civil Engineers (Great Britain), Institution of Mechanical Engineers (Great Britain). Railway Division., Railtex International Railway Engineering Conference (2000 : Birmingham, England), and Railway Technology Conference (2000 : Birmingham, England), eds. Railway rolling stock. Professional Engineering for IMechE, 2001.
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Great Britain. Department of Transport. Railway privatisation: Passenger rolling stock. The Department, 1993.
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W, Rush R. The Furness Railway: Locomotives and rolling stock. Oakwood Press, 1987.
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Institution of Mechanical Engineers (Great Britain). Railway Division. and International Union of Public Transport., eds. Railway vehicle body structures. Published for the Institution of Mechanical Engineers by Mechanical Engineering Publications, 1985.
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(1996), Railtech 96. Railway rolling stock: Selected papers from Railtech 96. Mechanical Engineering Publications Limited for the Institution of Mechanical Engineers, 1996.
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Great Western Railway Company (Canada). Specification for a second-class coach for the Great Western Railway. s.n., 1991.
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Ed, Davis. They moved the millions: A brief history of passenger cars of America's most heavily travelled passenger railway, the New York City Transit System. Livingston Enterprise, 1985.
Find full textBook chapters on the topic "Underground railway rolling stock"
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Profillidis, V. A. "Rolling Stock." In Railway Planning, Management, and Engineering, 5th ed. Routledge, 2022. https://doi.org/10.4324/9780429329302-19.
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Pyrgidis, Christos N. "Behaviour of rolling stock on track." In Railway Transportation Systems, 2nd ed. CRC Press, 2021. http://dx.doi.org/10.1201/9781003046073-3.
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Reuther, Markus, and Thomas Schlechte. "Optimization of Rolling Stock Rotations." In Handbook of Optimization in the Railway Industry. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72153-8_10.
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Bannikov, Dmitry, and Nina Sirina. "Development of Innovative Railway Rolling Stock Technologies." In VIII International Scientific Siberian Transport Forum. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37916-2_39.
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Pinchuk, Anastasia, Pavel Dadoenkov, Andrejs Baranovskis, Aleksandrs Nikolajevs, and Assylzhan Mukasheva. "Fastening Device of the Railway Rolling Stock." In ICTE in Transportation and Logistics 2019. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39688-6_28.
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Bustos, Alejandro, Higinio Rubio, Cristina Castejon, Enrique Soriano-Heras, and Juan Carlos Garcia-Prada. "Towards Digitalizing Rolling Stock Maintenance." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_61.
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AbstractThe advent of Industry 4.0 has revolutionised the way in which all aspects of a product or service are approached, and the railway sector is moving toward the adoption of this new paradigm. Maintenance in railways is traditionally based on a preventive approach that replaces parts at regular intervals or when a failure occurs. However, the 4.0 revolution implies the use of new strategies based on condition monitoring and predictive maintenance for moving towards Maintenance 4.0. In this work, the creation of a digital twin that helps in the adoption of new technologies is established. The proposed digital twin covers the trailer bogie of a high-speed train and is composed of three models: a 3D geometrical model, a finite element model and a multi-body model. These three models provide the initial information about the dynamic performance of the bogie that should be completed with feedback from the actual bogie operating in the real world.
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Sirina, Nina, and Svetlana Yushkova. "Operation of Infrastructure and Rolling Stock at Railway Polygon." In VIII International Scientific Siberian Transport Forum. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37916-2_36.
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Sukhanov, Andrey V. "Railway Rolling Stock Tracking Based on Computer Vision Algorithms." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39216-1_6.
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Morito, Susumu, Yuho Takehi, Jun Imaizumi, and Takayuki Shiina. "Optimization Models for Multi-period Railway Rolling Stock Assignment." In Lecture Notes in Computer Science. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45587-7_34.
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Persson, Rickard, Libor Lochman, and Jens König. "Regional Rail Rolling Stock Requirements and Specifications." In Lecture Notes in Mobility. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-85578-8_69.
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Abstract With the support of EU’s key funding program Horizon Europe, the Europe’s Rail Joint Undertaking (EU-Rail) aims to deliver faster deployment of innovations in the railway design. The EU-Rail FutuRe project aims at tackling the increasing Total Cost of Ownership (TCO) of European interoperable regional lines by means of providing new innovative solutions to make these lines cost-effective and attractive. Setting the right level of requirements and specification for the regional rail rolling stock plays therefore an important role in meeting the FutuRe objectives. The detailed objectives are to define a vehicle concept for up to 100 passengers or corresponding freight with significant vehicle weight savings compared to existing rolling stock. The key systems for the research are the mechanical arrangement to avoid unnecessary weight and reduce maintenance costs on vehicle and track, the propulsion system which must be emission free despite that these lines often are non-electrified and the control system which may be combined with train protection system and offer autonomous running.
Conference papers on the topic "Underground railway rolling stock"
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Zhang, Shuai, Yihui Wang, and Yicheng Zhou. "A Two-Stage Ant Colony Algorithm for Rolling Stock Circulation Planning for Railway Lines." In 2024 IEEE 27th International Conference on Intelligent Transportation Systems (ITSC). IEEE, 2024. https://doi.org/10.1109/itsc58415.2024.10920080.
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Sieczkarek, Krzysztof, Bartłomiej Nagórny, Tomasz Warzyński, Adam Maćkowiak, Michał Rokossowski, and Radosław Szczepański. "Innovative Immunity Testing Method of Train Detection Systems to Magnetic Fields coming from passing Railway Rolling Stock." In 2024 IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI). IEEE, 2024. http://dx.doi.org/10.1109/emcsipi49824.2024.10705615.
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Alekseev, V. M., D. N. Khusenov, A. S. Smetskaya, and A. M. Avtonoshkin. "IDENTIFICATION OF OBJECTS ON THE RAILWAY TRANSPORT INFRASTRUCTURE." In Intelligent transport systems. Russian University of Transport, 2024. http://dx.doi.org/10.30932/9785002446094-2024-504-511.
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The article discusses the issues of identifying objects (rolling stock, specialized equipment and maintenance personnel) moving along the railway infrastructure. The use of optical cable laid along the railway track (underground). will allow you to control the movement of objects along the railway infrastructure, as well as control the illegal entry of foreign objects. The article outlines solutions for extracting a useful signal from a noisy signal - corresponding to various types of objects using adaptive filtering based on the Kalman filter (determining the distribution parameters of random noisy interference and the useful signal). The work considers a solution to the problem of recognizing various objects moving along the railway infrastructure based on the signal they produce, based on convolutional neural networks, and also proposes a solution for determining the parameters of the movement of a train - its integrity and the number of cars.
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Garzón, Jorge, José Carlos Hidalgo, Federico Jorreto, Patricia Cara, and Joaquín Ramos. "EMFRail: A Tool to Calculate Rail Traction Electromagnetic Fields." In 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2201.
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EMC/EMI is a source of concern from the beginning of planning a new railway line. High powered electrified railways such as HSR are usually AC electrified. This poses a hazard for nearby systems and users. Induced voltages can create electric shock risks or malfunction in signalling or other nearby systems. LRTs, metro lines or commuter systems are usually DC fed and can be located near electromagnetic sensitive equipment such as MRI equipment in hospitals or research equipment — such as electron microscopes — in campuses or laboratories. EMF calculation and impact assessment in early phases of the project rely on simulation and expertise in these complex multi system interrelations. Rail traction creates EM fields which tend to decrease rapidly as the distance from the track axis increases. However, considerations about passengers, workforce and public safety and system compatibility are always needed. As an example, transient currents in DC rail, especially due to short circuits or arcs can interfere with nearby equipment. Even semi steady state DC currents associated with normal operation of the line (traction and breaking currents) present EMC related hazards that need to be assessed in order to evaluate if mitigation measures for associated risks are needed. AECOM’s Madrid Transportation Design Center has developed a tool that provides 3D EMF calculations for railway lines, either AC or DC. This tool, called EMFRail, can deliver EMF estimations based on power load supply simulations considering alignment, separation between tracks, geometry of the electrification system (OCS, third rail), rolling stock mechanical and electric features as well as regenerative braking in order to provide decision support information to make educated project decisions from the beginning of the design. Regenerative braking is a common energy saving tool for railways these days, but has posed new EMF hazards since currents sent back to the OCS can be bigger than those related to traction and this process can occur in different locations of the line (usually when the train is decelerating from maximum speed). This tool can calculate both magnetic and electrical fields for traction frequencies. This tool has been used in several LRT and rail projects providing insightful information to adopt mitigation measures such as underground feeders or operational limitations. EMFRail can simulate mitigation measures for challenging situations such as EMF caused by semi steady state maximum currents (prior to the trip of protection systems). EMFRail can also provide EMF calculations for transmission or distribution power lines once the required current or voltage values (module and phase) are known as well as the position of the different conductors (OCS wires, feeders, rails) of the line under study. EMFRail is developed using MatLab programming suite taking advantage of matrix operation capabilities. Output results are isocurves that can be superimposed to a raised view drawing, 3D contours for specific magnetic field values or even time animated frames to understand worst case scenarios that sometimes are not easy to foresee based on common assumptions.
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Lewis, T. "Rolling stock safety assurance [railway safety]." In IEE Seminar on Safety Assurance. IEE, 2005. http://dx.doi.org/10.1049/ic:20050419.
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Rowell, A. J. "Rolling stock EMC emission measurements." In IEE Seminar EMC Assurance in a Railway Environment. IEE, 2003. http://dx.doi.org/10.1049/ic:20030071.
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Wilson, James. "Rolling Stock Specification for an Auto-Transformer Electrification System." In Railway Electrification. Institution of Engineering and Technology, 2014. http://dx.doi.org/10.1049/ic.2014.0059.
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Younes, Alyaa M., Islam Ali, and Amr B. Eltawil. "Railway Rolling Stock Assignment for Passenger Trains." In 2022 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM). IEEE, 2022. http://dx.doi.org/10.1109/ieem55944.2022.9989961.
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Redin, A. L., Yu V. Babkov, D. V. Kotyaev, А. А. Olentsov, and А. А. Zemskov. "Reduction of environmental impact from railway rolling stock." In THE 6TH INTERNATIONAL CONFERENCE ON ENERGY, ENVIRONMENT, EPIDEMIOLOGY AND INFORMATION SYSTEM (ICENIS) 2021: Topic of Energy, Environment, Epidemiology, and Information System. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0104650.
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Tréfond, S., H. Djellab, E. Escobar, A. Billionnet, and S. Elloumi. "A robust-planning methodology for railway rolling-stock." In COMPRAIL 2012. WIT Press, 2012. http://dx.doi.org/10.2495/cr120291.
Full textReports on the topic "Underground railway rolling stock"
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Bermudez, Joseph, Marie DuMond, and Victor Cha. Wonsan Railway Rolling Stock Complex. National Geospatial-Intelligence Agency, 2018. https://doi.org/10.63836/41xp-f8s2.
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Bermudez, Joseph. Part 2: Ore Car Activity Up at Wonsan Railway Rolling Stock Complex. National Geospatial-Intelligence Agency, 2018. https://doi.org/10.63836/m9tz-rkwm.
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