Danishevskyy, VV, Andrianov, I, Awrejcewicz, J and Markert, B (2017) Influence of geometric and physical nonlinearities on the internal resonances of a finite continuous rod with a microstructure. Journal of Sound and Vibration, 386. pp. 359-371. ISSN 0022-460X

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In this work, nonlinear longitudinal vibrations of a finite composite rod are studied including geometric and physical nonlinearities. An original boundary value problem for a heterogeneous rod yielded by the macroscopic approximation obtained earlier by the higher-order asymptotic homogenization method is used. The effects of internal resonances and modes coupling are predicted, validated and analyzed. The defined novel continuous problem governed by PDEs is solved using space-discretization and the method of multiple time scales. We are aimed at understanding and analyzing how the presence of the microstructure influences the processes of mode interaction. It is shown that, depending on a scaling relation between the amplitude of the vibrations and the size of the unit cell, different scenarios of the modes coupling can be realized. Additionally to the asymptotic solution, numerical simulation of the modes coupling is performed by means of the Runge-Kutta fourth-order method. The obtained numerical and analytical results demonstrate good qualitative agreement.

Item Type: Article
Uncontrolled Keywords: nonlinear vibrations, rod, microstructure, physical and geometric nonlinearities, dispersion, asymptotic homogenization method, space-discretization, method of multiple time scales, numerical simulation, internal resonance, energy transfers between modes
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Natural Sciences > School of Computing and Mathematics
Depositing User: Symplectic
Date Deposited: 12 Dec 2016 09:56
Last Modified: 22 Jun 2018 12:50
URI: https://eprints.keele.ac.uk/id/eprint/2597

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