Vibration damping in polygonal plates using the acoustic black hole effect : model based on the image source method

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URI: http://hdl.handle.net/2042/46328
Title: Vibration damping in polygonal plates using the acoustic black hole effect : model based on the image source method
Author: CUENCA, Jacques; PELAT, Adrien; GAUTIER, François
Abstract: A method for damping flexural vibrations in thin polygonal plates using the acoustic black hole effect is proposed. Acoustic black holes in thin plates consist of a zone of decreasing thickness in which flexural waves slow down, acting as wave sinks. An acoustic black hole of axisymmetric thickness profile is here tested on different polygonal plates. A parabolic edge is added in order to focus waves into the black hole area. The experimental results show significant reduction of the vibration level. A model based on the image source method provides qualitative agreement with the experiments.
Subject: Dynamique, ondes et vibrations
Publisher: AFM, Maison de la Mécanique, 39/41 rue Louis Blanc, 92400 Courbevoie, France(FR)
Date: 2011

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