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Wyszukujesz frazę "Grigorev, Igor" wg kryterium: Autor

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    Tytuł:
    Efficiency improvement of forest machinery exploitation
    Autorzy:
    Grigorev, Igor
    Kunickaya, Ol'ga
    Prosuzhih, Alexey
    Kruchinin, Igor
    Shakirzyanov, Dmitry
    Shvetsova, Viktoria
    Markov, Oleg
    Egipko, Sergey
    Powiązania:
    https://bibliotekanauki.pl/articles/329658.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    forest harvesting
    load carrying capacity
    vehicles
    skidding
    soil
    wheel adhesion
    drewno
    zrywka
    pojazd
    przyczepność kół
    Opis:
    The purpose of this work was to develop a model of the interaction process between the wheeled forwarder and the soil of the cutting area, which allows evaluating the influence of soil conditions, the parameters of the wheeled forwarder, as well as load and number of cycles of its application, on the indicators of resistance and adhesion of the forwarder to the traction surface. Modeling results for 3- and 4-axle forest machines with different load levels showed that for different soil categories, types of bodies, and tire sizes. The results of the approximation analysis enabled the derive of calculation formulas for estimating the propulsive coefficient and rut depth after the first passage depending on the values of load-bearing capacity, body load coefficient, wheel width, and soil deformation module. The proposed model can be used at laying down the skidding roads and its optimization not only in economic terms but also with respect to the environment as intensive harvesting operations lead to extensive soil destructions. The practical application of the results is expressed in increased performance capacities of wood skidding operations and minimization of costs for restoring the productivity of forest area.
    Źródło:
    Diagnostyka; 2020, 21, 2; 95-109
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assesment the effect of skidding techniques on the ecological efficiency of the skidding tractor
    Autorzy:
    Grigorev, Igor
    Kunickaya, Ol'ga
    Burgonutdinov, Albert
    Burmistrova, Olga
    Druzyanova, Varvara
    Dolmatov, Nikolay
    Voronova, Anna
    Kotov, Alexey
    Powiązania:
    https://bibliotekanauki.pl/articles/328888.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    high latitude forests
    permafrost soils
    reduction of environmental consequences
    ochrona lasów
    zrywka
    skutki środowiskowe
    Opis:
    The study aims to build a model for the assessment of soil compaction processes, which take place under the influence of individual components of the skidding system such as a forwarder and a log being moved over the terrain. This aim is relevant in the context of forest preservation and ecological footprint-related issues. The model of a single log impact on the soil is based on establishing calculation formulas for determining soil compaction factors and shelterbelt size. The efficiency of the model was assessed on different soil categories and compared to experimental findings. The value of relative soil compaction within the trail boundary and the size rs of the maximum compaction area in the radial direction from the track, the width of the shelterbelt of undergrowth or cut-to-length root system were estimated based on the initial contact parameters.
    Źródło:
    Diagnostyka; 2020, 21, 3; 67-75
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical studies of dynamic soil compaction by wheeled forestry machines
    Autorzy:
    Grigorev, Igor
    Kunickaya, Ol'ga
    Burgonutdinov, Albert
    Ivanov, Viktor
    Shuvalova, Svetlana
    Shvetsova, Viktoria
    Stepanishcheva, Marina
    Tikhonov, Evgeniy
    Powiązania:
    https://bibliotekanauki.pl/articles/328511.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    d'Alembert's principle
    dynamic soil compaction
    Laplace transform
    tractor’s cyclic circuit
    Kelvin-Voigt model
    zasada d'Alemberta
    dynamiczne zagęszczanie gleby
    transformacja Laplace'a
    model Kelvina-Voigta
    Opis:
    The impact of forest skidding machine tires on the soil differs depending on topography, soil properties, and type of the wheel system. The development of a mathematical model describing the entire dynamic process is a challenging but relevant task to assess the level of impact. The work aims mathematical modeling of the impact caused by the skidding system on the forest soil employing Kelvin-Voigt theory with additional elastic element and Laplace transform equations. A dynamic model represents the "traktor-timber bundle– soil" system. According to the results of mathematical modeling, it was found that studying the vertical vibrations and vibrations of sprung mass in longitudinal and transverse planes is sufficient for examining dynamic soil compaction. Developed methods of statistical dynamics with the presentation of the track surface microroughness and the theory of linear elastic and viscous soil deformation showed that each pass of the skidding system is ac-companied by additional dynamic soil compaction. Its maximum value depends on the properties of the soil and skidding system, as well as on the presence of resonant zones in the frequency spectrum. The results of these studies provide an opportunity to predict the exposure level of skidders and establish new solutions to minimize negative consequences for the environment and productivity of the forest industry.
    Źródło:
    Diagnostyka; 2020, 21, 4; 3-13
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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