Materiały konferencyjne, referaty (WM)

Stały URI dla kolekcjihttp://hdl.handle.net/11652/163

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20212

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Autorsearch.filters.applied.operator.equals: search.filters.author.Awrejcewicz, JanTematsearch.filters.applied.operator.equals: search.filters.subject.dynamika

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Teraz wyświetlane 1 - 2 z 2
  • Pozycja
    Higher order asymptotic homogenization for dynamical problems
    (Wydawnictwo Politechniki Łódzkiej, 2021) Awrejcewicz, Jan; Andrianov, Igor I.; Diskovsky, A.A.
    In general, asymptotic homogenization methods are based on the hypothesis of perfect scale separation. In practice, this is not always the case. The problem arises of improving the solution in such a way that it becomes applicable if inhomogeneity parameter is not small. Our study focuses on the higher order asymptotic homogenization for dynamical problems. Systems with continuous and piecewise continuous parameters, discrete systems, and also continuous systems with discrete elements are considered. Both low-frequency and highfrequency vibrations are analyzed. For low-frequency vibrations, several approximations of the asymptotic homogenization method are constructed. The influence of the boundary conditions, the system parameters is investigated.
  • Pozycja
    Construction and 3D model of stand for investigating a non-ideal forcing in a nonlinear chain dynamics of self-excited oscillators with friction
    (Wydawnictwo Politechniki Łódzkiej, 2021) Rogala, Patryk; Olejnik, Paweł; Awrejcewicz, Jan
    The research involves application and research on a non-ideal forcing to modelling and identification of vibrating systems with friction. It is still an innovative approach in the numerical analysis of vibrations of mechatronic machines and devices. This will allow to make a much real numerical modelling and more efficient identification of nonlinear dynamic phenomena observed in vibrating systems with friction, and thus, a better modelling of such phenomena in computer programs. To obtain the goal, initial 3D model of the mechanical stand was made in the CAD software. Based on the 3D model, real stand will be built, and experiments will be held to obtain data that will be necessary to ensure correctness of the mathematical model, which also will be studied and developed.