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    Wyświetlanie 1-3 z 3
    Tytuł:
    Studying the dynamic system “tire-suspension-body” by the resonance method
    Autorzy:
    Gogiashvili, Phridon
    Kbilashvili, David
    Chogovadze, Jumber
    Lekveishvili, Gocha
    Sirbiladze, Besik
    Powiązania:
    https://bibliotekanauki.pl/articles/2098077.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    vibration
    oscillation
    amplitude
    stiffness
    damping
    drgania
    oscylacje
    amplituda
    sztywność
    tłumienie
    Opis:
    By comparing the results of a pilot study of the damping coefficient of a pneumatic tire carried out on a test bench, this study justifies the possibility of using the less time-consuming experimental resonance curve method instead of the dynamic loop method. A mathematical model of the vertical oscillations of a vehicle’s dynamic system “pneumatic wheel-suspension-sprung weight”was created on the test-bench, and an image of the amplitude-frequency characteristic of the sprung weight oscillation was obtained. The approaches and results of the pilot and analytical studies presented in the article aid the selection of the tire with the best damping properties. The use of the experimental resonance curve method to determine the damping characteristic of a vehicle’s tire is limited in the external frequency range of the resonant frequencies. In this case, we have to use the dynamic loop method.
    Źródło:
    Transport Problems; 2021, 16, 1; 63--72
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical modeling of the motion parameters of a disabled person in a bus
    Autorzy:
    Chogovadze, Jumber
    Gogiashvili, Phridon
    Lekveishvili, Gocha
    Kbilashvili, David
    Mardaleishvili, Nodar
    Powiązania:
    https://bibliotekanauki.pl/articles/1841229.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    physical model
    disabled person
    bus
    wheelchair
    model fizyczny
    osoba niepełnosprawna
    autobus
    wózek inwalidzki
    Opis:
    With a view to determining the dynamics and possible trauma sustained by a disabled person in a wheelchair in the passenger compartment of a bus, a physical model has been developed. The system, as the time function, generalized in the coordinates X(t), (t), was described by second-order Lagrangian differential equations. The proposed mathematical model allows for determining the motion characteristics of disabled people in a wheelchair in a bus that can cause injuries. This paper presents the curves of the change in coordinates of the angular velocity of the head and its center of gravity, as well as the curve of the change in the angle between the femur and the wheelchaior seat, through mathematical modeling and an experiment.
    Źródło:
    Transport Problems; 2020, 15, 1; 49-59
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing the time costs of passenger transport of people with disabilities
    Autorzy:
    Gogiashvili, Phridon
    Chogovadze, Jumber
    Lekveishvili, Gocha
    Kbilashvili, David
    Sirbiladze, Besik
    Dograshvili, Vazha
    Powiązania:
    https://bibliotekanauki.pl/articles/374031.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    person with disability
    mathematical model
    optimization
    passenger
    osoba niepełnosprawna
    model matematyczny
    optymalizacja
    pasażer
    Opis:
    The paper dwells on a mathematical model of the logistical system of transport services for persons with disabilities, and there have been analyzed factors that affect the time spent on their transportation. When developing methodology for optimizing the time costs of passenger transport of persons with disabilities, the following two basic transportation services have been taken into account: (a) "social taxi", which will transport only people with special health; (b) a vehicle system in combination with urban passenger transport, which will transport representatives of the group of people with restricted mobility together with all other passengers. The study found that in the case of insufficient accessibility to the required environment, by the increase in the demand of disabled people for transportation by "social taxi", travelling costs are increased that results in increasing total costs of the carrier. Based on a comparative analysis of logistical costs, optimum relationship between the number of the adapted buses and “social taxi” on the route under study has been established.
    Źródło:
    Transport Problems; 2019, 14, 2; 123-133
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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