Nonlinear Dynamics

, Volume 87, Issue 4, pp 2415–2433 | Cite as

Optimization mechanism of targeted energy transfer with vibro-impact energy sink under periodic and transient excitation

Original Paper

Abstract

This paper is dedicated to exploit the same optimization mechanism of targeted energy transfer under different types of excitation. Specifically, a linear oscillator (LO) coupled with a vibro-impact nonlinear energy sink is analytically studied with an asymptotical method. The optimization mechanism under periodic excitation with a single frequency and under transient excitation is numerically obtained and experimentally validated for the first time. For periodic excitation, the boundary between the regime with two impacts per cycle and that of strongly modulated response (SMR) is proved to be optimal rather than SMR. The chaotic SMR is experimentally observed from the viewpoint of displacement of LO. The above-observed mechanism is further applied to explain the optimization mechanism under transient excitation and that under periodic excitation with a range of frequency. It is experimentally verified that the optimization of the latter can be simplified to the optimization under an excitation with a single resonance frequency. For transient excitation, the efficiency of different transient response regimes is experimentally compared, which agrees with the periodic results. Moreover, the efficiency comparison of different lengths of cavity is also experimentally validated. In short, the close relation of optimization under different excitations is clearly demonstrated.

Keywords

Optimal design Targeted energy transfer Vibro-impact Nonlinear energy sink Impact damper 

Notes

Acknowledgements

The authors acknowledge the French Ministry of Science and the Chinese Scholarship Council under Grant No. 201304490063 for their financial support.

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Institut Clément Ader (ICA), CNRS-INSA-ISAE-Mines Albi-UPSUniversité de ToulouseToulouseFrance

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