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Enhancing targeted energy transfer by using several nonlinear membrane absorbers

Pierre-Olivier Mattei 1, * Romain Bellet 2 Bruno Cochelin 3 Renaud Côte 1
* Corresponding author
1 Sons
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille] : UPR7051
3 M&S - Matériaux et Structures
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
Abstract : One of the main drawbacks of the targeted energy transfer (TET) phenomena in acoustics is the relative short existence zone of TET. This communication presents how to obtain an enhanced efficiency of TET by using multiple nonlinear membrane absorbers in parallel. We show this way, mainly thanks to an experimental set-up with two membranes, that the different absorbers have additional effects that extend the efficiency and the possibilities of observation of TET. Different behavior of the system under sinusoidal forcing and free oscillations, characterizing the phenomena for all input energies, as well as frequency responses, showing successive clipping of the original resonance peak of the system, are presented. A model is finally used to generalize these results to more than two NES and to simulate the case of several very similar membranes in parallel which shows how to extend the existence zone of TET.
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Submitted on : Monday, April 23, 2012 - 10:00:00 AM
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Pierre-Olivier Mattei, Romain Bellet, Bruno Cochelin, Renaud Côte. Enhancing targeted energy transfer by using several nonlinear membrane absorbers. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810706⟩

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