Текущий выпуск Номер 5, 2024 Том 16

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Результаты поиска по 'nondestructive testing':
Найдено статей: 2
  1. Петров И.Б.
    Application of the grid-characteristic method for mathematical modeling in dynamical problems of deformable solid mechanics
    Компьютерные исследования и моделирование, 2019, т. 11, № 6, с. 1041-1048

    The grid-characteristic method is a promising numerical method for solving hyperbolic systems of equations, e.g., equations describing elastic and acoustic waves. This method has high precision and allows physically correct simulations of wave processes in heterogeneous media. The grid-characteristic method makes it possible to correctly take into account boundary conditions and conditions on surfaces with different physical characteristics. The method offers the greatest advantages for one-dimensional equations, especially in combination with a fixed difference grid, as in conventional grid-based methods. However, in the multidimensional case using the algorithms of splitting with respect to spatial variables, the author has managed to preserve its positive qualities. The use of the method of Runge–Kutta type, or the integro-interpolation method for hyperbolic equations makes it possible to effectively carry out a generalization of methods developed for linear equations, in the nonlinear case, in particular, to enforce the difference analogs of the conservation laws, which is important for shock-capturing, for example, discontinuous solutions. Based on the author’s variant of the grid-characteristic method, several important problems of seismic prospecting, seismic resistance, global seismic studies on Earth and Mars, medical applications, nondestructive testing of railway lines, the simulation of the creation and characteristics of composite materials for the aerospace industry and other areas of practical application were numerically solved. A significant advantage of the constructed method is the preservation of its stability and precision at the strains of the environment. This article presents the results of a numerical solution based on the grid-characteristic method to the problem of modeling elastic-plastic deformation in traumatic brain injury.

    Ключевые слова: hyperbolic type equations, elastic and plastic deformation, grid-characteristic method, finite difference schemes, discontinuous solutions.
    Petrov I.B.
    Application of the grid-characteristic method for mathematical modeling in dynamical problems of deformable solid mechanics
    Computer Research and Modeling, 2019, v. 11, no. 6, pp. 1041-1048
    Keywords: hyperbolic type equations, elastic and plastic deformation, grid-characteristic method, finite difference schemes, discontinuous solutions.
  2. Липовко П.О., Логанчук М.Л.
    Компонентный анализ бинарных сред методом акустической рефлектоимпедансометрии
    Компьютерные исследования и моделирование, 2015, т. 7, № 2, с. 301-313

    Рассматривается компьютерная модель компонентного анализа бинарных сред, основанная на применении нового метода — акустической рефлектоимпедансометрии и реализованная в среде графического программирования LabVIEW. Обсуждаются перспективы метрологического и приборного обеспечения экспериментальных приложений модели.

    Ключевые слова: ультразвук, диагностика, неразрушающий контроль, коэффициент отражения, акустический импеданс.
    Lipovko P.O., Loganchuk M.L.
    Component analysis of binary media using acoustic reflectoimpedancemetry
    Computer Research and Modeling, 2015, v. 7, no. 2, pp. 301-313

    A computer model of component analysis of binary media, based on application of a new method acoustic reflecto-impedancemetry and realized in graphic programming environment LabVIEW is considered. Prospects of metrological and instrumental provisions of experimental applications of the model are discussed.

    Keywords: ultrasound, diagnosis, nondestructive testing, reflection coefficient, acoustical impedance.
    Цитирований: 4 (РИНЦ).

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