Numerical and Experimental Study of the Energy Pumping of the First Vibration Modes of a Mechanical System Using Bi-Stable Attachment

Pierre-Olivier Mattei (1, 2) , Rémi Ponçot (3) , Marc Pachebat (2) , Renaud Côte (2, 1)

1 Sons
2 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
3 Parrot

In order to control the sound radiation by a structure, one aims to control vibration of radiating modes of vibration using " Energy Pumping " also named " Targeted Energy Transfer ". This principle is here applied to a simplified model of a double leaf panel. This model is made of two beams coupled by a spring. One of the beams is connected to a non-linear absorber. This non-linear absorber is made of a 3D-printing support on which is clamped a buckled thin small beam with a small mass fixed at its center having two equilibrium positions. Once attached onto a vibrating system to control, a one direction energy exchange from the primary vibrating system to the non-linear absorber can be achieved under special operation. Our experimentations have shown that this simple bi-stable device leads up to more than 10 dB attenuation for the first two vibration modes of the system.

Domaines: Acoustique [physics.class-ph]

Pierre-Olivier Mattei, Rémi Ponçot, Marc Pachebat, Renaud Côte. Numerical and Experimental Study of the Energy Pumping of the First Vibration Modes of a Mechanical System Using Bi-Stable Attachment. Noise and Vibration: Emerging technologies (NOVEM 2015), Apr 2015, Dubrovnik, Croatia. ⟨hal-01319210⟩