Результаты поиска по 'frame design':
Найдено статей: 2
  1. Pechenyuk A.V.
    Optimization of a hull form for decrease ship resistance to movement
    Computer Research and Modeling, 2017, v. 9, no. 1, pp. 57-65

    Optimization of hull lines for the minimum resistance to movement is a problem of current interest in ship hydrodynamics. In practice, lines design is still to some extent an art. The usual approaches to decrease the ship resistance are based on the model experiment and/or CFD simulation, following the trial and error method. The paper presents a new method of in-detail hull form design based on the wave-based optimization approach. The method provides systematic variation of the hull geometrical form, which corresponds to alteration of longitudinal distribution of the hull volume, while its vertical volume distribution is fixed or highly controlled. It’s well known from the theoretical studies that the vertical distribution can't be optimized by condition of minimum wave resistance, thus it can be neglected for the optimization procedures. The method efficiency was investigated by application to the foreship of KCS, the well-known test object from the workshop Gothenburg-2000. The variations of the longitudinal distribution of the volume were set on the sectional area curve as finite volume increments and then transferred to the lines plan with the help of special frame transformation methods. The CFD towing simulations were carried out for the initial hull form and the six modified variants. According to the simulation results, examined modifications caused the resistance increments in the range 1.3–6.5 %. Optimization process was underpinned with the respective data analysis based on the new hypothesis, according to which, the resistance increments caused by separate longitudinal segments of hull form meet the principle of superposition. The achieved results, which are presented as the optimum distribution of volume present in the optimized designed hull form, which shows the interesting characteristics that its resistance has decrease by 8.9 % in respect to initial KCS hull form. Visualization of the wave patterns showed an attenuation of the transversal wave components, and the intensification of the diverging wave components.

    Keywords: hull flow simulation, hull form optimization, numerical towing test.
    Views (last year): 10. Citations: 1 (RSCI).
  2. Ovcharenko E.A., Klyshnikov K.U., Savrasov G.V., Nyshtaev D.V., Kudryavtseva Y.A.
    Choice of design of transcatheter aortic valve prosthesis frame based on finite element analysis
    Computer Research and Modeling, 2015, v. 7, no. 4, pp. 909-922

    This article presents an analysis of the impact of the transcatheter prosthesis frame design features on the results of its implantation in the aortic root model. In this paper we analyzed the various approaches to the design of such structures, as well as modifications in order to improve their functional characteristics during the implantation. As a general method for obtaining the results of interaction of the objects was used finite element method with nonlinear materials description and analysis of the main parameters: the stress-strain state, radial and friction forces.

    Keywords: Valve prosthesis, aorta, FEA, frame design.
    Views (last year): 3. Citations: 1 (RSCI).

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