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Impact of non-linear resonators in periodic structures using a perturbation approach

Research output: Contribution to journalArticle

Original languageEnglish
Article number106408
Number of pages15
JournalMechanical Systems and Signal Processing
Volume135
Early online date10 Oct 2019
DateAccepted/In press - 29 Sep 2019
DateE-pub ahead of print - 10 Oct 2019
DatePublished (current) - 1 Jan 2020

Abstract

The work describes the wave propagation in a periodic structure formed by a linear spring-mass chain with local Duffing non-linear resonators. The wave propagation is studied using the Floquet-Bloch theorem combined with a perturbation approach to identify the dispersion relations in the nonlinear periodic structure. The theoretical model is benchmarked by a numerical model that considers an analogous finite resonant spring-mass system. The numerical nonlinear model provides an apparent dispersion relation of the structure obtained from an inverse identification method, the latter based on imposing a wave number as an initial condition, and then obtaining the corresponding frequency from the analysis of the chain amplitude in the time domain. The perturbation and the numerical methods are compared to discuss the behaviour of the wave propagation in the nonlinear resonators periodic chain. The perturbation is then compared with the Harmonic Balance Method previously used in the literature. Keywords: Periodic structures, Resonators, Non-linearities

    Research areas

  • Periodic structures, Resonators, Non-linearities

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  • Full-text PDF (Author’s accepted manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S0888327019306296?via%3Dihub. Please refer to any applicable terms of use of the publisher.

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    Embargo ends: 10/10/20

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    Licence: CC BY-NC-ND

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