Journal of Automation and Information Sciences

ISSN for PRINT: 1064-2315

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2001, Volume33

Issue 9

82 pages

Issue price - $221.00

Yuriy A. Mitropolskiy
International Mathematical Center of National Academy of Sciences of Ukraine, Kyiv, Ukraine

Oleg S Limarchenko
International Mathematical Center of National Academy of Sciences of Ukraine, Kyiv, Ukraine

Govanni Matarazzo
University of Salerno, Italy

Louisa Toscano
University of Naples "Federico II", Italy

We consider the behavior of elastic systems with external unilateral interaction (friction, recovering forces, forces of relay type), which are given as functions defined by inequalities relative to unknown variables. The investigation is based on application of the concept of motion separation (coupled application of methods of motion decomposition with respect to normal modes of oscillations, asymptotic methods of nonlinear mechanics and frequency separation of motions). This approach makes it possible to construct a discrete nonlinear model of the investigated system and the analytical-numerical method for its investigation. The transient modes of the system motion were studied. Peculiarities of manifestation of nonlinear properties of the system are discussed. We consider also the case of oscillations of elastic systems with variable stiffness coupled with unilateral interaction. The results of numerical simulation were presented. It was shown that the unilateral interaction generates conditions for prevention of the resonant development of oscillations and can be considered as a means for active suppression of oscillations.

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