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Communication Dans Un Congrès Année : 2011

Experimental Investigation of Low Frequency Noise Reduction Using a Nonlinear Vibroacoustic Absorber

Sergio Bellizzi
Bruno Cochelin
Cédric Pinhède

Résumé

This work deals with the energy pumping phenomenon for acoustical applications. The concept of energy pumping is to passively reduce the vibrations of a primary system by attaching to it an essentially nonlinear damped oscillator also named Nonlinear Energy Sink (NES) creating a strongly nonlinear coupling which localizes and dissipates the vibrational energy. In the context of acoustics, a vibroacoustic coupling is used. In an earlier work, we showed experimentally that a loudspeaker used as a Suspended Piston (SP) working outside its range of linearity can be used as a NES. In this work, the performance and efficiency of a SP NES is studied numerically and experimentally. The considered acoustic medium is a resonant pipe. The coupling between the pipe and the NES is ensured acoustically by a small acoustic compliance (the air in a coupling box). Various observed aspects of energy pumping are presented: behavior under sinusoidal forcing, pumping threshold, resonance capture and transient response. As a SP NES technology permits an easy control of the moving mass of the NES, the effect of this parameter is also studied.
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Dates et versions

hal-04375274 , version 1 (05-01-2024)

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Citer

Sergio Bellizzi, Bruno Cochelin, Philippe Herzog, Pierre-Olivier Mattei, Cédric Pinhède. Experimental Investigation of Low Frequency Noise Reduction Using a Nonlinear Vibroacoustic Absorber. ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Aug 2011, Washington, United States. pp.353-360, ⟨10.1115/DETC2011-47431⟩. ⟨hal-04375274⟩
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