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IssuesArchive of Issues2006-2pp.134-143

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L. P. Dzubak, G. V. Manucharyan, Yu. V. Mikhlin, and T. V. Shmatko, "Stability of regular and chaotic vibration modes in systems with several equilibrium states," Mech. Solids. 41 (2), 134-143 (2006)
Year 2006 Volume 41 Number 2 Pages 134-143
Title Stability of regular and chaotic vibration modes in systems with several equilibrium states
Author(s) L. P. Dzubak (Kharkov)
G. V. Manucharyan (Kharkov)
Yu. V. Mikhlin (Kharkov)
T. V. Shmatko (Kharkov)
Abstract Forced vibrations of a system with two degrees of freedom and several equilibrium states are considered. Such systems can be obtained by discretizing elastic systems in a post-critical state. The modes of vibrations that are periodic if the amplitude of the external periodic excitation is small and become chaotic as this amplitude increases are studied. To investigate the stability of such vibration modes, computational procedures based on the classical definition of the Lyapunov stability are utilized. The stability of vibration modes of nonlinear rods, shells, and arches is analyzed.

The mutual instability of the phase trajectories is utilized as a criterion of the appearance of the chaotic behavior in a nonlinear system. Trajectories with very close initial conditions are compared. The computational procedures based on the classical definitions of the Lyapunov stability enable one to judge the stability or instability of these trajectories. Specific calculations for the time-varying Duffing equation and the von Mises truss allow one to observe the appearance and expansion of the chaotic behavior domains.
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Received 20 August 2002
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