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Wyszukujesz frazę "Marchuk, M." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Geometrically nonlinear free transversal vibrations of thin-walled elongated panels with arbitrary generatrix
    Autorzy:
    Marchuk, M.
    Goriachko, T.
    Pakosh, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/128061.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    elongated panels
    vibrations
    nonlinearity
    perturbation method
    panele podłużne
    drgania
    nieliniowość
    metoda perturbacji
    Opis:
    The algorithm for finding a finite number of the first values of natural frequencies and forms of geometrically nonlinear free transverse vibrations of thin-walled elongated panels with arbitrary generatrix is proposed and verified. Under normal coordinate quadratic the approximation of displacements is used. Along the tangential coordinates used one-dimensional finite elements. The discrete variation problem is built. For its solving the perturbation method is applied. The numerical results are compared with previously obtained by other authors.
    Źródło:
    Vibrations in Physical Systems; 2014, 26; 153-160
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural frequencies of layered elongated cylindrical panels for geometrically nonlinear deformation at discrete consideration of components
    Autorzy:
    Marchuk, M.
    Goriachko, T.
    Pakosh, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/128246.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    elongated layered panel
    nonlinear vibrations
    perturbation method
    natural frequencies
    panele podłużne
    drgania nieliniowe
    metoda perturbacji
    częstotliwość drgań własnych
    Opis:
    The proposed and verified the technique of finding a finite number of first natural frequencies for geometrically nonlinear vibrations of layered elongated cylindrical panels at discrete consideration of components. The influence of the radius of curvature on the natural frequencies of three- and five-layered panels is investigated. The dependence between the volume of filler three-layer panels and the lowest natural frequency has been established.
    Źródło:
    Vibrations in Physical Systems; 2016, 27; 255-264
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    To determine the stability of the metrobus in unstable driving modes
    Autorzy:
    Marchuk, Roman
    Marchuk, Nazar
    Sakhno, Volodymyr
    Poliakov, Viktor M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1838347.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    metrobus roll
    acceleration
    stability
    trailer
    Opis:
    Recently in many cities of the world began to introduce so-called «metrobus» or BRT (Bus Rapid Transit) systems, which became a cheaper alternative to the metro and other rail transport, in particular trams. The aim of the work is to determine the stability indicators of the metrobus in the transitional traffic modes, in particular when performing such manoeuvres as «steering wheel jerk» and «shuffle». For this purpose, the equations of metrobus plane-parallel motion are supplemented by equations of the links of the road train in the vertical plane by halopilation (tangage, trim) and roll. The critical straight-line speed of the three-link metrobus has been determined, which was 32,06 m/s, and this speed is independent of the corners of the steering wheels of the bus and the trailer links. It has been shown that as the steering wheel angle of the bus increases, the difference in the folding angles of the bus increases, with the second folding angle significantly exceeding the first, especially considering the roll of the metrobus body. It has been established that the greatest rolls and loads of the metrobus axles are those of the last trailer, which is the limiting factor for the critical speed. The lateral accelerations of individual metrobus links and their yaw velocity when performing the manoeuvre «steering wheel jerk» and «shuffle, Sl = 24 m», show that both the bus and the second trailer link are a limiting factor when performing various manoeuvres, but the acceleration value does not exceed the permissible 0.4 g, so its stability under these conditions is ensured.
    Źródło:
    Archiwum Motoryzacji; 2021, 91, 1; 63-79
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanism of origin of structural vibrations in conical roller bearings
    Autorzy:
    Marchuk, V. I.
    Ravenets, L. M.
    Marchuk, S. V.
    Świć, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/103313.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    vibroactivity
    geometric undulation
    structural vibration microtopography
    design
    technological factors
    Opis:
    This paper investigates the mechanism of origin of structural, structural and technological defects of rollers. The technique for integrated indicator of vibration working surfaces of the rings to determine the level of life of the finished part to the operation as part of the bearing and predict the vibroacoustic characteristics of rolling bearings. It was established that technological defects cause low-frequency and high-frequency vibrations. The question about the extent to which it is necessary to strengthen the tolerances on the parameters of bearings on which vibration level is determined not errors bearing parts and their structural properties. Calculated values of the amplitudes vibroacceleration due to the rigidity of the bearing vibrations are so small that in some cases adopted precision calculations turned enough to detect such vibrations. Thus, when tested on the vibro-acoustic installations structural vibration does not play an important role.
    Źródło:
    Advances in Science and Technology. Research Journal; 2014, 8, 23; 68-72
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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