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    Wyświetlanie 1-4 z 4
    Tytuł:
    Seismic Behavior of Earth Dams With Different Reservoir Water Levels Under Near-Field and Far-Field Earthquakes
    Autorzy:
    Asadi, Masoud
    Soltani, Fazlollah
    Sinvandi-Pour, Abbas
    Noroozinejad Farsangi, Ehsan
    Powiązania:
    https://bibliotekanauki.pl/articles/1838051.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    earthquakes
    seismic behaviour
    earth dam
    water levels
    finite element modelling
    trzęsienia ziemi
    badania sejsmiczne
    zapory ziemne
    poziom wody
    modelowanie elementów skończonych
    Opis:
    The height of reservoir water is one of the important factors affecting the seismic behaviour of earth dams. A large number of earth dams have been constructed in different countries that are sometimes located in a high-risk geographical zone. The studies on the seismic behaviour of earth dams have been conducted for several decades. However, this study, considering the importance of the subject, it investigates the seismic behaviour of Sumbar rock-fill embankment dam under near- and far-field earthquakes with variation in the water level behind the dam. The ratio of water height of the dam to dam height is considered as an important indicator to investigate the seismic performance of these structures. The analyses were performed using the ABAQUS finite element platform, under 7 near-field and 7 far-field earthquake records. In this research, the changes in dam stresses, displacements, and failure of the dam have been discussed. The results indicated that the effect of near-field earthquakes on the seismic behaviour of earth dams is more significant than far-field earthquakes.
    Źródło:
    Civil and Environmental Engineering Reports; 2020, 30, 4; 125-141
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic Behavior of Earth Dams With Different Reservoir Water Levels Under Near-Field and Far-Field Earthquakes
    Autorzy:
    Asadi, Masoud
    Soltani, Fazlollah
    Sinvandi-Pour, Abbas
    Noroozinejad Farsangi, Ehsan
    Powiązania:
    https://bibliotekanauki.pl/articles/1838069.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    earthquakes
    seismic behaviour
    earth dam
    water levels
    finite element modelling
    trzęsienia ziemi
    badania sejsmiczne
    zapory ziemne
    poziom wody
    modelowanie elementów skończonych
    Opis:
    The height of reservoir water is one of the important factors affecting the seismic behaviour of earth dams. A large number of earth dams have been constructed in different countries that are sometimes located in a high-risk geographical zone. The studies on the seismic behaviour of earth dams have been conducted for several decades. However, this study, considering the importance of the subject, it investigates the seismic behaviour of Sumbar rock-fill embankment dam under near- and far-field earthquakes with variation in the water level behind the dam. The ratio of water height of the dam to dam height is considered as an important indicator to investigate the seismic performance of these structures. The analyses were performed using the ABAQUS finite element platform, under 7 near-field and 7 far-field earthquake records. In this research, the changes in dam stresses, displacements, and failure of the dam have been discussed. The results indicated that the effect of near-field earthquakes on the seismic behaviour of earth dams is more significant than far-field earthquakes.
    Źródło:
    Civil and Environmental Engineering Reports; 2020, 30, 4; 125-141
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of unscented Kalman filter for clutch position control of automated manual transmission
    Autorzy:
    Soltani, Abbas
    Arianfard, Milad
    Jazar, Reza Nakhaie
    Powiązania:
    https://bibliotekanauki.pl/articles/2172774.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automated clutch
    actuator
    adaptive sliding mode control
    estimator
    unscented Kalman
    filter
    automatyczne sprzęgło
    sterowanie trybem ślizgowym
    taksator
    Kalman
    filtr
    Opis:
    In this paper, an adaptive sliding mode controller (ASMC) is proposed for an electromechanical clutch position control system to apply in the automated manual transmission. Transmission systems undergo changes in parameters with respect to the wide range of driving condition, such as changing in friction coefficient of clutch disc and stiffness of diaphragm spring, hence, an adaptive robust control method is required to guarantee system stability and overcome the uncertainties and disturbances. As the majority of transmission dynamics variables cannot be measured in a cost-efficient way, a non-linear estimator based on unscented Kalman filter (UKF) is designed to estimate the state valuables of the system. Also, a non-linear dynamic model of the electromechanical actuator is presented for the automated clutch system. The model is validated with experimental test results. Numerical simulation of a reference input for clutch bearing displacement is performed in computer simulation to evaluate the performance of controller and estimator. The results demonstrate the high effectiveness of the proposed controller against the conventional sliding mode controller to track precisely the desired trajectories.
    Źródło:
    Archive of Mechanical Engineering; 2022, LXIX, 2; 319--339
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance of Solid Waste Landfills Under Earthquake-Induced Vibrations
    Autorzy:
    Seyedi Marghaki, Behnaz
    Soltani, Fazlollah
    Noroozinejad Farsangi, Ehsan
    Sivandi-Pour, Abbas
    Powiązania:
    https://bibliotekanauki.pl/articles/27314724.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    landfill
    earthquake
    walls stability
    geosynthetics
    FEM
    ABAQUS
    rupture
    numerical modelling
    wysypisko śmieci
    trzęsienia ziemi
    stabilność ścian
    geosyntetyki
    MES
    modelowanie numeryczne
    Opis:
    The stability inside the waste, internal stability, and co-stability between the elements of the insulation system and the landfill bed should be considered in the landfill design. The stresses and the resulting deformations in both mineral and geosynthetic materials of the insulation system must be controlled in the design, so that an unpredictable flow path is not created. Besides, long-term durability in the insulation system should be considered. An evaluation of the durability of the system requires knowledge of the interaction between the components and the waste as a settling object. The numerical modeling methods can be used to evaluate the local instability. In this study, a landfill constructed in the UK has been modeled in ABAQUS finite element platform and was verified with the results of obtained data from precision instruments at the landfill site. Then, by applying the earthquake excitations, the seismic behavior of the solid waste landfill under Far-Field and Near-Field earthquakes and their effect on the durability of the landfill wall system were investigated. The outputs include maximum displacement, maximum stress, the most critical state, and investigation of yield stress and rupture of the geomembrane layer. The results indicated that in the landfill wall, the maximum displacement occurs in the waste section. It occurs especially between the boundary of natural soil and waste. It was also observed that the geomembrane layer under the earthquake loadings had experienced some ruptures.
    Źródło:
    Civil and Environmental Engineering Reports; 2022, 32, 2; 1--22
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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