dc.description.abstract | In the past two decades, meta-materials have drawn increasing attention from researchers due to their unique properties, including wave attenuation with potential application in acoustic engineering. A number of meta-material designs have been proposed for wave attenuation at different frequencies. In this work, a new configu-ration of chiral honeycomb meta-material is proposed for the attenuation of middle-low frequency elastic waves. The dynamic characteristics of the new-proposed structure were investigated numerically with band diagram analysis. The results show that the proposed structure is able to create multiple band gaps at middle frequency range. Interestingly, two extra band gaps induced by local resonance effect can be created with reduction of the chiral angle of the unit cell, and one of the bandgaps is located at low frequency range. The wave attenuation performance of the proposed meta-material was also simulated using sound transmission loss finite element analysis, demonstrating the potential of the structure in real applications. | en_US |