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    Tytuł:
    Specification of estimation of a passenger car ride smoothness under various exploitation conditions
    Autorzy:
    Vaičiūnas, Gediminas
    Steišūnas, Stasys
    Bureika, Gintautas
    Powiązania:
    https://bibliotekanauki.pl/articles/2038040.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    railway transport
    passenger car
    running gear
    independently rotating wheels
    Sperling's comfort index
    divergences
    numerical simulation
    software package UM
    Opis:
    The stability and smoothness of rolling stock running could be defined accurately by universal Sperling's comfort index. The divergences of variation of Sperling's comfort index of a passenger car under specific operating conditions of running gear are examining in this paper. Numerical simulations of a passenger car running with independently rotating wheels under various conditions have been performing. Gained results showed that divergences of the Sperling's comfort index variation are particularly significant due to running gear component oscillations in the horizontal plane (lateral direction). A field experiment of a passenger car with a solid (traditional) wheelset with a flat running surface proved this hypothesis. The obtained results of this experiment confirmed this assumption. Therefore, the study of the regularities of lateral oscillations of a passenger car is the logical direction of further research.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 4; 719-725
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of improving a rail vehicle running safety with independently rotating wheels
    Autorzy:
    Mikhailov, Evgeny
    Semenov, Stanislav
    Shvornikova, Hanna
    Dižo, Ján
    Blatnický, Miroslav
    Droździel, Paweł
    Kravchenko, Kateryna
    Powiązania:
    https://bibliotekanauki.pl/articles/2176117.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    rail vehicle
    running safety
    independently rotating wheels
    mathematical calculation
    pojazd szynowy
    bezpieczeństwo jazdy
    niezależnie obracające się koła
    obliczeniA matematyczne
    Opis:
    This work is focused on the possible ways of improving the running safety of a railway vehicle, which uses IRWs (independently rotating wheels) in a bogie. It discusses the main positive and negative properties of an application of IRWs for a railway vehicle while it is running in a curve. There are evaluated running properties of a railway vehicle in terms of safety for IRWs and a standard wheelset (SW). It is assumed that a wheelset design with IRWs will reduce the risk of derailment of a railway vehicle in a curve with a smaller radius because it will be reached a more favourable distribution of decisive forces in the wheel/rail contact. A designed wheelset with IRWs differs from other IRWs designs; in this case, only a flange can rotate independently from a wheel treat surface about the axis of rotation. Further, this research presents an analysis of a friction forces distribution of the friction forces in a contact of a flange and a rail head and a comparison with an SW. The obtained results allow concluding that it is advisable to use the wheels with the perspective wheel design (including independently rotating) to reduce the resistance to movement and improve the running properties of a railway vehicle for safety.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 93--106
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and simulation of a control system of wheels of wheelset
    Autorzy:
    Chudzikiewicz, Andrzej
    Gerlici, Juraj
    Sowińska, Magdalena
    Stelmach, Anna
    Wawrzyński, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/1833651.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rail vehicle
    independently rotating wheels
    control system
    modelling
    simulation
    pojazd szynowy
    niezależnie obracające się koła
    układ sterowania
    modelowanie
    symulacja
    Opis:
    Modern light rail vehicles, such as a tram or rail bus, due to the need to provide mobility for the elderly or disabled people and the requirements of operators operating passenger rail transport or transport in urban areas must have a 100% low floor. Structurally, this is associated with the use of wheelset with independently rotating wheels (IRW) in such vehicles. It is also possible to use a bogie structure without the use of a wheelset axle by mounting the wheels directly in the side parts of the bogie frame. This construction is more complex and will not be discussed in this article. Bearing in mind the dynamic behavior of such vehicles during operation (lateral stability, profile wear) in various driving conditions (curve traffic, crossovers) and taking into account operating costs, it becomes necessary to install wheel rotation control systems to maintain center movement mass of the wheelset around the centerline of the track. The subject of the article will be considerations on modeling and simulation of rail vehicle bogie motion with IRW sets including the wheel control system. Nominal and mathematical models of the analyzed vehicle will be presented, as well as a controlled strategy based on the comparison of the angular velocities of the wheels of the wheelset A review of works on solutions of such systems will be presented, and a control concept will be proposed. The summary contains conclusions regarding the possibility of practical use of the proposed method of steering wheels of a wheelset in the case of independently rotating wheels.
    Źródło:
    Archives of Transport; 2020, 55, 3; 73-83
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the derailment safety index Y/Q of the low-floor tram bogies with different types of guidance of independently rotating wheels
    Autorzy:
    Opala, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/223583.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    derailment safety
    safety
    simulation
    independently rotating wheels
    low-floor tram
    wykolejenie
    bezpieczeństwo
    symulacja
    niezależnie obracające się koła
    tramwaj niskopodłogowy
    Opis:
    Modern tram designs use different conceptions of how to implement the low-floor functionality. The key construction part is the bogie running gear which has to accommodate the lower part of the tram body. To adjust the low-floor level, many low-floor tram bogies have different types of guidance of independently rotating wheels with no central axle between the two wheels. Lack of self-steering mechanism in the form of central axle coupling or an external guiding device creates several inherent problems, such as insufficient guiding and excessive wear. Another important context is the safety against derailment when the vehicle negotiates a curved track. In this study the dynamic behaviour of non-powered bogies with different types of guidance of independently rotating wheels are presented using computer simulation models. The simulation results of the Y/Q index are compared for the two track configurations (curved and tangent sections) and four different kinds of bogie running gear.
    Źródło:
    Archives of Transport; 2016, 38, 2; 39-47
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptation of rail passenger car suspension parameters to independently rotating wheels
    Autorzy:
    Vaičiūnas, Gediminas
    Steišūnas, Stasys
    Bureika, Gintautas
    Powiązania:
    https://bibliotekanauki.pl/articles/2098090.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    railway
    Nadal criterion
    Sperling's comfort index
    running gear
    independently rotating wheels
    kolej
    Kryterium Nadala
    wskaźnik komfortu Sperlinga
    podwozie
    niezależnie obracające się koła
    Opis:
    This study aimed to adjust the rail passenger car running gear parameters by adapting them to independently rotating wheels. The most important aspect was the safety of the passenger car running in terms of derailment; thus, the values of the Nadal criterion were calculated first. Another aspect to consider is passenger comfort based on the values of Sperling’s comfort index according to the rail passenger car speed. The modes of suspension behaviour during operation were considered in two typical conditions: on a straight track section and on a curve with a 200-m radius. Calculations were performed using Universal Mechanism software. The results are interpreted in the paper, and the final conclusions of this study are given.
    Źródło:
    Transport Problems; 2021, 16, 1; 215--226
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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