Nonlinear targeted energy transfer of two coupled cantilever beams coupled to a bistable light attachment

P.-O Mattei (1) , R Ponçot (2) , M Pachebat (1) , Renaud Côte (1)

1 Sons
2 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 nonlinear absorber. This nonlinear absorber is made of a 3D-printed support on which is clamped a buckled thin small beam with a small mass fixed at its center having two equilibrium positions. The experiments showed that, once attached onto a vibrating system to be controlled, under forced excitation of the primary system, the light bistable oscillator allows a reduction of structural vibration up to 10 dB for significant amplitude and frequency range around the first two vibration modes of the system.

Mots clés: Noise Reduction; Energy Pumping; Nonlinear Absorber; Bi-stable Attachment; Buckled Beam

Domaines: Acoustique [physics.class-ph]

P.-O Mattei, R Ponçot, M Pachebat, Renaud Côte. Nonlinear targeted energy transfer of two coupled cantilever beams coupled to a bistable light attachment. Journal of Sound and Vibration, 2016, ⟨10.1016/j.jsv.2016.03.008⟩. ⟨hal-01318317⟩