WSEAS Transactions on Acoustics and Music
Print ISSN: 1109-9577
Volume 3, 2016
Design of an Innovative Acoustic Metamaterial
Authors: ,
Abstract: This report presents the design of an innovative acoustic metamaterial, in particular the design of a negative stiffness element that can attenuate the vibration level in a wide range of frequencies. The theoretical basis for the design of the metamaterial is the concept of negative stiffness, in the sense that the slope of the force-displacement diagram for the particular metamaterial becomes approximately zero. This has significant advantages as a zero stiffness element cannot transfer vibrations at any frequency. The downside of many zero stiffness elements is that they cannot carry any dead load. As will be shown in this study, this is not the case for the particular metamaterial. A prototype of this metamaterial has been produced using HDPE and tested under different conditions. The numerical results and experimental measurements demonstrate its intended behavior and provide a basis for further improvements and optimization.
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Pages: 1-6
WSEAS Transactions on Acoustics and Music, P-ISSN: 1109-9577, Volume 3, 2016, Art. #1