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Perturbation method for the dynamic analysis of a bistable oscillator under slow harmonic excitation
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  • Journal title : Smart Structures and Systems
  • Volume 18, Issue 1,  2016, pp.183-196
  • Publisher : Techno-Press
  • DOI : 10.12989/sss.2016.18.1.183
 Title & Authors
Perturbation method for the dynamic analysis of a bistable oscillator under slow harmonic excitation
Luongo, Angelo; Casciati, Sara; Zulli, Daniele;
In this paper a nonlinear, bistable, single degree of freedom system is considered. It consists of a Duffing oscillator externally excited by a non-resonant, harmonic force. A customized perturbation scheme is proposed to achieve an approximate expression for periodic solutions. It is based on the evaluation of the quasi-steady (slow) solution, and then on a variable change followed by two perturbation steps which aim to capture the fast, decaying contribution of the response. The reconstructed solution, given by the sum of the slow and fast contributions, is in a good agreement with the one obtained by numerical integration.
energy harvesting;duffing oscillator;slow-fast dynamics;perturbation method;
 Cited by
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