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    Wyświetlanie 1-7 z 7
    Tytuł:
    Bionic shape design of electric locomotive and aerodynamic drag reduction
    Autorzy:
    Wu, Z.
    Huo, Y.
    Ding, W.
    Xie, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/224333.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electric locomotive
    bionic shape design
    aerodynamic drag
    numerical simulation
    crocodile bionic electric locomotive
    lokomotywa elektryczna
    bioniczny design
    opór aerodynamiczny
    symulacja numeryczna
    Opis:
    Bionics has been widely used in many fields. Previous studies on the application of bionics in locomotives and vehicles mainly focused on shape optimisation of high-speed trains, but the research on bionic shape design in the electric locomotive field is rare. This study investigated a design method for streamlined electric locomotives according to the principles of bionics. The crocodiles were chosen as the bionic object because of their powerful and streamlined head shape. Firstly, geometric characteristic lines were extracted from the head of a crocodile by analysing the head features. Secondly, according to the actual size requirements of the electric locomotive head, a free-hand sketch of the bionic electric locomotive head was completed by adjusting the position and scale of the geometric characteristic lines. Finally, the non-uniform rational B-splines method was used to establish a 3D digital model of the crocodile bionic electric locomotive, and the main and auxiliary control lines were created. To verify the drag reduction effect of the crocodile bionic electric locomotive, numerical simulations of aerodynamic drag were performed for the crocodile bionic and bluff body electric locomotives at different speeds in open air by using the CFD software, ANSYS FLUENT16.0. The geometric models of crocodile bionic and bluff body electric locomotives were both marshalled with three cars, namely, locomotive + middle car + locomotive, and the size of the two geometric models was uniform. Dimensions and grids of the flow field were defined. And then, according to the principle of motion relativity, boundary conditions of flow field were defined. The results indicated that the crocodile bionic electric locomotive demonstrated a good aerodynamic performance. At the six sampling speeds in the range of 40–240 km/h, the aerodynamic drag coefficient of the crocodile bionic electric locomotive decreased by 7.7% on the average compared with that of the bluff body electric locomotive.
    Źródło:
    Archives of Transport; 2018, 48, 4; 99-109
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibration reduction design with hybrid structures and topology optimization
    Autorzy:
    Huo, F.
    Yang, D.
    Zhao, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/260590.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hybrid structure
    vibration reduction
    materials selection
    topology optimization
    Opis:
    The hybrid structures show excellent performance on vibration reduction for ship, aircraft and spacecraft designs. Meanwhile, the topology optimization is widely used for structure vibration reduction and weight control. The design of hybrid structures considering simultaneous materials selection and topology optimization are big challenges in theoretical study and engineering applications. In this paper, according to the proposed laminate component method (LCM) and solid isotropic microstructure with penalty (SIMP) method, the mathematical formulations are presented for concurrent materials selection and topology optimizations of hybrid structures. Thickness distributions of the plies in laminate components are defined as materials selection design variables by LCM method. Relative densities of elements in the components are defined as topology design variables by SIMP method. Design examples of hybrid 3-bar truss structures and hybrid floating raft with vibration reduction requirements verified the effectiveness of the presented optimization models.
    Źródło:
    Polish Maritime Research; 2016, S 1; 10-19
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of fine ilmenite flotation performed in a cyclonic-static micro-bubble flotation column
    Autorzy:
    Fan, G.
    Liu, J.
    Cao, Y.
    Huo, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/109539.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cyclonic-static micro-bubble flotation column
    fine ilmenite
    optimum parameters
    continuous flotation
    Opis:
    A cyclonic-static micro-bubble flotation column was applied to upgrade fine ilmenite. The optimum parameters of flotation in the column were determined basing on the grade-recovery upgrading curve. A continuous pilot plant test was conducted using the optimum parameters during rougher-cleaner process. When compared with the optimized parameters of the industrial flotation machines, the cyclonic-static micro-bubble flotation column provides higher concentrate grade and recovery: 48.11% with a growth of 1.08 percentage points and 82.36% with an increment of 13.64 percentage points, respectively. Moreover, the flowsheet is simplified to two steps (rougher-cleaner) in the cyclonic-static micro-bubble flotation column from six steps (one rougher-two scavengers-three cleaners) in the flotation machines. Therefore, the cyclonic-static micro-bubble flotation column is an effective tool for fine ilmenite beneficiation.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 2; 823-834
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation on Curing Properties and Kinetics of Isophthalonitrile Oxide
    Autorzy:
    Fan, Y.
    Tang, C.
    Hu, Q.
    Lei, Y.
    Huo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/780045.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    N,N-dihydroxybenzene-1,3-dicarboximidoyl dichloride
    kinetics
    elastomer
    synthesis
    1,3-dipolar cycloaddition
    Opis:
    N,N-dihydroxybenzene-1,3-dicarboximidoyl dichloride was synthesized from benzene-1,3-dicarboxaldehyde and characterized by fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance  1H and 13C NMR). The elastomer was prepared through the 1,3-dipolar cycloaddition of reaction between liquid polybutadiene (LPB) and isophthalonitrile oxide in this work. The tensile strength of different elastomer was enhanced from 0.14 MPa to 0.33 MPa as the elongation at break decreased from 145% to 73%, and the modulus increased from 0.09 kPa to 0.47 kPa. The parameters of kinetic indicated that the curing reaction was first order reaction and the apparent activation energy of each curing system was less than 10.10 kJ/mol when the content of N,N-dihydroxybenzene-1,3- dicarboximidoyl dichloride was increased from 7% to 12%. These results suggested that nitrile oxides achieved curing of polymer binders at room temperature and this work had definite guiding significance for the application of nitrile oxides in polymer binders.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 3; 37-46
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chitosan Modified Corn Starch and Its Application as a Glass Fibre Sizing Agent
    Skrobia kukurydziana modyfikowana chitozanem i jej zastosowanie jako środka klejącego włókien szklanych
    Autorzy:
    Wang, Y.
    Li, J.
    Li, H.
    Wang, X.
    Lei, H.
    Huo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/232005.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    glass fiber
    sizing agent
    corn starch
    chitosan
    modification
    włókno szklane
    środki klejące
    skrobia kukurydziana
    chitozan
    modyfikacja
    Opis:
    Chitosan-modified corn starch was prepared and then applied as a glass fiber sizing agent. The effect of the chitosan on starch-based emulsion, film and sized glass fiber was studied. When 5 % of the chitosan was added, the overall performance of the modified film-forming agent was optimal. The viscosity, surface tension and zeta potential of the sizing agent were 44.99 mPa·s, 51.29 mN·m-1 and 4.5 mV, respectively. The modified sizing agent could easily spread over the surface of glass fibre, and conglutinated to the glass surface firmly. The tensile strength and stiffness of modified-starch glass fiber reached 0.43 N·tex-1 and 4.96 cm. Glass fiber with good overall performance was obtained.
    W pracy przygotowano skrobię kukurydzianą modyfikowaną chitozanem, a następnie zastosowano ją jako środek klejący włókien szklanych. Określono lepkość, napięcie powierzchniowe i potencjał zeta środka klejącego. Zmierzono wytrzymałość na rozciąganie i sztywność zmodyfikowanego włókna szklanego. Stwierdzono, że modyfikacja skrobi chitozanem powoduje poprawienie jej właściwości jako środka klejącego. Modyfikacja zwiększyła przyczepność skrobi do włókien i poprawiła ich właściwości mechaniczne.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2017, 3 (123); 112-120
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic damage behaviour of aeolian sand reinforced concrete columns with I-shaped structural steel
    Autorzy:
    Wang, Y. H.
    Wang, H. Y.
    Wang, Y. P.
    Zhao, M.
    Qi, J.
    Huo, G. Z.
    Liu, P. Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849772.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    piasek eoliczny
    słup żelbetowy
    stal konstrukcyjna
    przekrój I
    zachowanie
    uszkodzenie sejsmiczne
    model uszkodzenia
    aeolian sand
    column
    I-shaped steel
    structural steel
    seismic damage
    behaviour
    damage model
    Opis:
    To promote the application of aeolian sand resources for steel-concrete composite structures, an aeolian sand reinforced concrete column with I-shaped structural steel is proposed in this study. Four specimens are designed and manufactured with different replacement rates of aeolian sand. The seismic behaviour and damage evolution process of the specimens are studied by low-cycle repeated loading tests. Based on the test results, the mechanical characteristics, failure modes, hysteresis curves, skeleton curves, energy dissipation capacity, displacement ductility, and stiffness degradation of the specimens with different replacement rates of aeolian sand are analysed. In addition, the effects of the design parameters on the seismic behaviour of the specimens are also studied. The results show that the indexes of the seismic behaviour can be significantly improved by adding steel. Moreover, a revised damage model is proposed, to better reflect the evolution law of seismic damage of aeolian sand reinforced concrete columns with steel. The proposed model can provide an important reference for seismic damage assessment of the columns.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 4; 633-650
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of self-biting behavior of mink by loop-mediated isothermal amplification (LAMP) and sequence-characterized amplified regions (SCAR)
    Autorzy:
    Liu, Z.Y.
    Song, S.S.
    Huo, Z.S.
    Song, X.C.
    Cong, B.
    Yang, F.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087715.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mink
    self-biting
    loop-mediated isothermal amplification
    sequence-characterized amplified regions
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 2; 371-376
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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