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    Tytuł:
    Estimation of dynamic performances of the safe operation of high-speed electric train
    Autorzy:
    Domin, R.
    Domin, I.
    Cherniak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/223834.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-speed electric train
    electric train
    safe operation
    computer simulation
    dynamic performances
    anti-yaw dampers
    szybki pociąg elektryczny
    pociąg elektryczny
    bezpieczeństwo
    symulacja komputerowa
    osiągi dynamiczne
    Opis:
    The process of implementation of new developments, in particular, new generation rolling stock holds a prominent place among the range of measures for organization of high-speed passenger rail transportation in Ukraine. The example of permission for use and the initial phase of work with interregional NRCS2 dual-mode electric trains produced by Hyundai-Rotem Corporation is the illustrative one in this context. Due to the detection of macro-cracks in bolster beams of the car body frames of these electric trains, namely in the areas of mounting of anti-yaw dampers, these trains were taken out of service until the completion of the modernization of problematic nodes. The comprehensive study on the determination of the safety parameters of electric trains was conducted to determine the causes of destruction of bolster beams. At the same time, bolster beams loading was estimated depending on the characteristics of anti-yaw dampers by means of computer simulation of the dynamics of motion of trailing and motor cars. The feasibility of selection of parameters for anti-yaw dampers mounted on electric train cars was assessed. The results of work will improve the safe operation of high-speed trains and increase the efficiency of estimates regarding the loading of bearing structures of underframes of the of rolling stock.
    Źródło:
    Archives of Transport; 2017, 41, 1; 7-16
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conception of modernization of a line section example in the context of a fast railway connection
    Autorzy:
    Mikulski, J.
    Gorzelak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/223739.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high speed rail
    HSR
    technical study
    fast railway
    pociąg szybkobieżny
    badanie techniczne
    szybka kolej
    Opis:
    For centuries, it is known that people always prefer to accommodate in the region where there is good transportation network. Proper organization of transportation is one of the key elements which influence the dynamics of the World economics system development. Thanks to infrastructure modernization which allows to transfer the goods between engaged parties, it is possible to increase production and commonly to intense exploitation of areas located near this infrastructure among others in industry purposes. With regard to increasing demand for effective and efficient transportation system, there is a real need to improve communication and transportation infrastructure. A chance for this target shall be modern high technologies, which allows running with very high speed and thus also to reduce journey time. For this purpose there were established and is still developing relatively new product – high speed rail which is supposed to revolutionize modern transportation system functioning in the World. The article calls attention on a chance for improving competitiveness of rail freight transportation in Poland thanks to developing high speed rail network. There is underlined also rationality of modernization of the rail line which connect the biggest cities in South part of Poland. The descriptive part of the article refers to the high speed rail system and its development conditions. The research part is a technical feasibility study about section Cracow – Katowice – Wroclaw and possibilities for adopting it to achieve high speed rail line parameters.
    Źródło:
    Archives of Transport; 2017, 44, 4; 47-54
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperloop vehicles spacing control challenges and possible solutions
    Sterowanie następstwem pojazdów hyperloop, wyzwania i możliwe rozwiązania
    Autorzy:
    Pawlik, Marek
    Kycko, Magdalena
    Zakrzewski, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/1852551.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hyperloop
    następstwo pojazdów
    przepustowość infrastruktury
    hyper-pociąg
    sprzęg wirtualny
    vehicles spacing
    infrastructure capacity
    hyper-train
    virtual coupling
    Opis:
    Amount of works and activities tending towards defining new transport mode on the basis of the hyperloop system concept is growing significantly. They assume use of individual vehicles, offering space for several dozen passengers, running with speeds near speed of sound in a closed space with significantly lowered air pressure, utilizing magnetic levitation. Simultaneously it is fairly from economic point of view assumed, that first implementations should link locations between which traffic demand is expected to be very high. Assumed short spacing between hyper-vehicles, which are frequently declared to be ad-hoc adjusted to transport demand, to the knowledge of the authors gained in railway transport, seems to be in conflict with high speed safety related spacing in view of the line infrastructure capacity operational rules defined in the UIC (International Union of Railways) documents. That is the challenge, that formed the basis for authors’ investigations described in the paper. Several thesis regarding future new mode of transport based on hyperloop concept form an outcome of those investigations presented in conclusions.
    Intensyfikowane są różnego rodzaju działania zmierzające do zdefiniowania nowego rodzaju transportu na bazie koncepcji systemu hyperloop. Zakłada się wykorzystywanie pojedynczych pojazdów, korzystających z lewitacji magnetycznej, oferujących miejsca dla kilkudziesięciu pasażerów, poruszających się z prędkością bliską prędkości dźwięku w zamkniętej przestrzeni z istotnie obniżonym ciśnieniem powietrza. Jednocześnie przyjmuje się, że pierwsze wdrożenia obsługiwać będą połączenia o bardzo wysokim zapotrzebowaniu na transport. Przyjmowane małe, na przykład dwuminutowe, ad hoc zmieniane, odstępy pomiędzy hyper-pojazdami, wedle wiedzy autorów pochodzącej z transportu szynowego, wydają się sprzeczne z zasadami zarządzania następstwem pojazdów poruszających się z dużymi prędkościami opisanymi w dokumentach Międzynarodowego Związku Kolei UIC definiujących eksploatacyjne zasady zarządzania przepustowością infrastruktury liniowej. Związane z tym wyzwania legły u podstaw rozważań autorów, które zaowocowały kilkoma tezami dotyczącymi przyszłego systemu hyperloop. Przedstawione w artykule rozważania wychodzą od różnych zasad zarządzania następstwem pociągów w transporcie kolejowym jako podstawy analizy potrzeb i możliwości zarządzania następstwem pojazdów w systemie hyperloop. Uwzględniono zarządzanie następstwem według zasady stałego odstępu blokowego oraz według zasady ruchomego odstępu blokowego rozróżniając względy i bezwzględny ruchomy odstęp blokowy. Przedstawiono podstawy definiowania przepustowości dla liniowej infrastruktury transportowej oraz koncepcję zwiększania przepustowości poprzez łączenie i dzielenie składów w biegu. We wnioskach wskazano, że w odniesieniu do systemów typu hyperloop należy uwzględnić potrzebę tworzenia hyper-pociągów z hyper-pojazdów oraz powiązania pomiędzy trzema systemami technicznymi: wirtualnymi sprzęgami, napędami pojazdów i systemami hamowania pojazdów. Na końcu artykułu wskazano ścieżkę dalszych prac przywołując normy definiujące formalne podejście do związanych z bezpieczeństwem systemów elektronicznych i programowalnych stosowanych w transporcie kolejowym. Podejście takie autorzy proponują w ramach prac wspólnego komitetu Technicznego CEN i CENELEC dedykowanego dla systemów hyperloop.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 2; 261-274
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of large-scale streamlined head cars of high-speed trains and aerodynamic drag calculation
    Autorzy:
    Wu, Z.
    Yang, E.
    Ding, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/224065.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high speed train
    NURBS
    aerodynamic drag
    streamlined head car
    numerical simulation
    pociąg ekspresowy
    opór aerodynamiczny
    symulacja numeryczna
    Opis:
    Aerodynamic drag plays an important role in high-speed trains, and how to reduce the aerodynamic drag is one of the most important research subjects related to modern railway systems. This paper investigates a design method for large-scale streamlined head cars of high-speed trains by adopting NURBS theory according to the outer surface characteristics of trains. This method first created the main control lines of the driver cab by inputting control point coordinates; then, auxiliary control lines were added to the main ones. Finally, the reticular region formed by the main control lines and auxiliary ones were filled. The head car was assembled with the driver cab and sightseeing car in a virtual environment. The numerical simulation of train flow field was completed through definition of geometric models, boundary conditions, and space discretization. The calculation results show that the aerodynamic drag of the high-speed train with large-scale streamlined head car decreases by approximately 49.3% within the 50-300 km/h speed range compared with that of the quasi-streamlined high-speed train. This study reveals that the high-speed train with large-scale streamlined head car could achieve the purpose of reducing running aerodynamic drag and saving energy, and aims to provide technical support for the subsequent process design and production control of high-speed train head cars.
    Źródło:
    Archives of Transport; 2017, 44, 4; 89-97
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the structure of an intelligent locomotive DSS and assessment of its effectiveness
    Autorzy:
    Gorobchenko, Oleksandr
    Nevedrov, Oleksandr
    Powiązania:
    https://bibliotekanauki.pl/articles/1833630.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intelligent locomotive
    intelligent system
    assessment effectiveness
    control strategy
    train
    inteligentna lokomotywa
    inteligentny system
    ocena sprawności
    strategia kontroli
    pociąg
    Opis:
    The purpose of the article is developing the locomotive structure of intellectual system of support of decision-making and to find a criterion by which to adequately assess different control action to the train. System of decision support for locomotive crew is seen as a complex structure with complex interactions located at a great distance, on-board locomotive systems. The quality of the organization determines the effectiveness of the system as a whole. To solve the problem of creating the optimal structure of the DSS applies the aggregate-decomposition method that involves two steps: decomposition of the problem into a number of subproblems and aggregating the partial results. To evaluate the quality control of a locomotive used the concept of control strategy with specific indicators. Design is developed and structure of locomotive DSS is obtained, taking into account peculiarities of operation of railway transport. To account for not only quantitative but also qualitative characteristics of activity of the locomotive or intellectual systems of decision support, it is proposed to use methods of fuzzy logic. So were able to deduce and calculate the additive criterion of the quality control activities of the intelligent system. Formal indicator of the quality of the train control process using different strategies is received. In the work theoretically grounded definition of the weighting factors for each partial criterion of the quality of train control. Using the dependencies derived, the nature of the influence of the value of partial criteria on the quality of train control in relation to a strategy. The results of the work allow to more accurately simulate the operations of a locomotive crew, which in the future will serve as the basis for the development of autonomous intelligent systems of locomotive control. The developed method is shown to be three main criteria which values the safety, energy consumption, and execution time schedule. However, for more flexible and accurate model, this approach allows to enter additional criteria, and the simplicity of the calculation provides the necessary speed when implemented on on-board locomotive computers.
    Źródło:
    Archives of Transport; 2020, 56, 4; 47-58
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of different marshalling forms on the aerodynamic performance of the freight train under crosswind
    Autorzy:
    Xie, Zihao
    Wu, Zhenfeng
    Zhu, Longhui
    Ding, Wangcai
    Powiązania:
    https://bibliotekanauki.pl/articles/1955094.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    freight train
    train marshalling
    crosswind
    aerodynamic drag
    lateral force
    pociąg towarowy
    prowadzenie pociągu
    wiatr boczny
    opór aerodynamiczny
    siła boczna
    Opis:
    Different types and quantities of freight cars will affect the marshalling forms of freight trains. In order to investigate the influence of the marshalling forms on the aerodynamic performance of freight trains under crosswind, three types of freight cars such as box cars, gondola cars and tank cars, were selected to marshal with locomotives. This paper used Detached Eddy Simulation method (DES) based on the SST k-ω turbulent model to simulate the aerodynamic performance of the freight train under crosswind. The wind speed, wind angle and train running speed were set as 25m/s, 45° and 100km/h respectively. The influence of different marshalling forms on the aerodynamic performance of the freight train such as aerodynamic drag and lateral force were calculated and compared. The results showed that the marshalling forms have significant effect on the aerodynamic drag and the maximum difference of the aerodynamic drag can reach 20.5%. Furthermore, the variations of the lateral force of the whole train and the locomotive are not apparent. The maximum difference is only 4.3% and 4.1% respectively. However, the changes of marshalling forms have obvious influence on the lateral force of each carriage. The maximum difference of the lateral force of the box car, gondola car and tank car is 17%, 20.1% and 24.1% respectively. The essential reason why the marshalling forms has a significant impact on the aerodynamic performance of the freight train is that there are obvious differences in the volume and shape structure of each railway carriage. The large volume of box cars and the cavity structure of gondola cars make their position a key factor affecting the aerodynamic performance of freight trains. Among the six different marshalling forms selected in this paper, the best marshalling form is: locomotive--gondola car--box car--tank car. Both the aerodynamic drag of the train and the lateral force of the boxcar are the smallest by taking this marshalling form.
    Źródło:
    Archives of Transport; 2021, 59, 3; 57-71
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation analysis of the impact of container wagon pin configuration on the train loading time in the intermodal terminal
    Autorzy:
    Nehring, Karol
    Kłodawski, Michał
    Jachimowski, Roland
    Klimek, Piotr
    Vašek, Rostislav
    Powiązania:
    https://bibliotekanauki.pl/articles/2067402.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    container train
    loading
    intermodal terminal
    wagon pin configuration
    simulation analysis
    FlexSim
    pociąg kontenerowy
    załadunek
    terminal intermodalny
    konfiguracja sworznia wagonu
    analiza symulacyjna
    Opis:
    The article presents the issues of a container train loading at the land intermodal terminal. This issue was considered from the point of view of the distance covered by the loading devices and the duration of loading works, which was influenced by the arrangement of containers on the storage yard and the configuration of pins on the wagons. The conducted research was dictated by the small number of publications on loading an intermodal train, especially from the point of view of pin configuration on wagons. The vast majority of the literature is devoted in this field to marine intermodal terminals, which operating characteristics are different from inland terminals. The importance of this problem resulting from the growing turnover of containers transported by rail transport was also pointed out. The systematic increase of this type of transport and the depletion of the intermodal services' operating capability makes it necessary to improve the train loading process. For the purposes of the research, the issues of containers of various sizes loading onto wagons planning with various pin configurations were presented. A literature review was carried out in the field of train loading methods and strategies. A mathematical model was developed for the decision situation under consideration. The equations defining the most important elements of the considered problem were presented in the general form. This model was implemented in the FlexSim simulation environment. The constructed simulation model was used to develop 12 variants of the approach to an intermodal train loading. The train loading tests were performed both for the random arrangement of containers on the storage yard and for the random arrangement of pins on the wagons. The obtained results made it possible to determine how the knowledge of the arrangement of pins on the wagons influences the planning of train loading and increases the efficiency of loading devices.
    Źródło:
    Archives of Transport; 2021, 60, 4; 155--169
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on speed control of high-speed train based on multi-point model
    Autorzy:
    Hou, Tao
    Guo, Yang-yang
    Niu, Hong-xia
    Powiązania:
    https://bibliotekanauki.pl/articles/224081.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-speed train
    multi-point model
    predictive control
    fuzzy control
    PID control
    speed control
    pociąg ekspresowy
    model wielopunktowy
    sterowanie predykcyjne
    sterowanie rozmyte
    sterowanie PID
    prędkość
    Opis:
    The traditional train speed control research regards the train as a particle, ignoring the length of the train and the interaction force between carriages. Although this method is simple, the control error is large for high-speed trains with the characteristics of power dispersion. Moreover, in the control process, if the length of the train is not considered, when the train passes the slope point or the curvature point, the speed will jump due to the change of the line, causing a large control error and reducing comfort. In order to improve the accuracy of high-speed train speed control and solve the problem of speed jump when the train runs through variable slope and curvature, the paper takes CRH3 EMU data as an example to establish the corresponding multi-point train dynamics model. In the control method, the speed control of high-speed train needs to meet the fast requirement. Comparing the merits and demerits of classical PID control, fuzzy control and fuzzy adaptive PID control in tracking the ideal running curve of high-speed train, this paper chooses the fuzzy adaptive PID control with fast response. Considering that predictive control can predict future output, a predictive fuzzy adaptive PID controller is designed, which is suitable for high-speed train model based on multi-point. The simulation results show that the multi-point model of the high-speed train can solve the speed jump problem of the train when passing through the special lines, and the predictive fuzzy adaptive PID controller can control the speed of the train with multi-point model, so that the train can run at the desired speed, meeting the requirements of fast response and high control accuracy.
    Źródło:
    Archives of Transport; 2019, 50, 2; 35-46
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic characteristics of underframe semi-active inerter-based suspended device for high-speed train based on LQR control
    Autorzy:
    Wang, Yong
    Li, Hao-Xuan
    Meng, Hao-Dong
    Wang, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/2173695.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dynamic characteristics
    high-speed train
    inerter-based suspended device
    LQR control
    Sperling index
    charakterystyka dynamiczna
    pociąg dużych prędkości
    aktywne zawieszenie na bazie inertera
    kontrola LQR
    indeks Sperlinga
    Opis:
    The underframe passive inerter-based suspended device, based on the inerter-spring-damper vibration attenuation structure, could improve the dynamic performance of the train body, but its parameters are fixed and cannot meet the dynamic performance requirements under different operating conditions. Therefore, a semi-active inerter-based suspended device based on the linear quadratic regulator (LQR) control strategy is proposed to further enhance the dynamic performance. The rigid-flexible coupling vertical dynamic model of the train body and an underframe semi-active inerter-based suspended device are established. The structural parameters of the semi-active inerter-based suspended device are adjusted using LQR control strategy. Dynamic response of the system is obtained using the virtual excitation method. The dynamic characteristic of the system is evaluated using the Sperling index and compared with those of the passive and semi-active traditional suspended devices as well as the passive inerter-based suspended devices. The vertical vibration acceleration of the train body and Sperling index using the semi-active inerter-based suspended device is the smallest among the four suspended devices, which denotes the advantages of using the inerter and LQR control strategy. The semi-active inerter-based suspended device could decrease the vertical vibration acceleration of the train body and further suppress its elastic vibration in the lower frequency band, more effectively than the other three suspended devices. Overall, the semi-active inerter-based suspended device could significantly reduce elastic vibration of the train body and improve its dynamical performance.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141722
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic analysis of an existing arch railway bridge according to Eurocodes
    Analiza dynamiczna istniejącego łukowego mostu kolejowego według Eurokodów
    Autorzy:
    Oleszek, R.
    Radomski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/962322.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    most łukowy
    beton sprężony
    pociąg dużej prędkości
    model numeryczny
    HSLM
    analiza dynamiczna
    odpowiedź dynamiczna
    arch bridge
    prestressed concrete
    high-speed train
    numerical model
    high speed load model
    dynamic analysis
    dynamic response
    Opis:
    Modern regulations concerning railway bridges are based on the approach of structural dynamics, which is described in PN-EN standards. This paper presents the results of theoretical dynamic analysis of the HSLM-A train set loading on the structure of a pre-stressed concrete arch bridge - the first railway bridge of its type which was built in Poland (completed in 1959). The recommendations of PN-EN have been followed and modal analysis was carried out to define the sensitivity of the structure to chosen eigenforms. Additionally the paper presents a course of calculations and the conclusions obtained from the analysis of displacements, accelerations, and bending moments induced in the structure through a simulated passage of a high-speed train in the context of the requirements of PN-EN Standards. The conclusions from the current calculations can be used for dynamic analysis of bridges of similar structural solutions.
    Współczesne przepisy kolejowe [1÷3, 8] bazują na Eurokodach [6, 7], w których dynamiczny charakter obciążenia uwzględniany jest na podstawie analizy dynamicznej odpowiedzi konstrukcji z symulacją ruchu obciążenia. Polega ona na wyznaczeniu bezpośrednich procesów deformacji i dystrybucji sił wewnętrznych i naprężeń od modelowych obciążeń pociągami szybkobieżnymi HSLM (High Speed Load Model). W referacie przedstawiono wyniki teoretycznej analizy oddziaływania modeli pociągów szybkobieżnych HSLM-A pod kątem wymagaPN-EN, na konstrukcję pierwszego wybudowanego w Polsce (1959 r.) łukowego mostu kolejowego z betonu sprężonego.
    Źródło:
    Archives of Civil Engineering; 2016, 62, 4/I; 99-117
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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