Novel locally resonant architected materials with tunable stop-bands
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نویسندگان
دانشگاه تهران
چکیده
Due to the application of architected materials in different aspects of acoustic and structural engineering, a great deal of effort has been devoted to study wave propagation in such structures. In the current manuscript, the effect of adding auxiliary resonators on the wave attenuation performance of square and triangular architected structures is investigated. The structures are modelled using finite element method and the wave propagation analysis is performed using the Bloch’s theorem. Moreover the effect of resonator orientation on the frequency range and width of the stop-bands is also investigated. It is found that using auxiliary resonators can lead to stop-bands of local resonance (LR) nature in the frequency ranges, in which, the conventional structures are unable to attenuate wave propagation. Moreover, changing the orientation of the resonators, the dispersion curves can be altered and the stop-bands can be tuned. The results of the current manuscript can introduce resonator orientation as another degree of freedom in designing architected materials with tunable wave attenuation performance.
کلیدواژه ها
 
Title
Novel locally resonant architected materials with tunable stop-bands
Authors
Soroush Sepehri, Mir Masoud Seyyed Fakhrabadi, Mahmoud Mousavi Mashhadi
Abstract
Due to the application of architected materials in different aspects of acoustic and structural engineering, a great deal of effort has been devoted to study wave propagation in such structures. In the current manuscript, the effect of adding auxiliary resonators on the wave attenuation performance of square and triangular architected structures is investigated. The structures are modelled using finite element method and the wave propagation analysis is performed using the Bloch’s theorem. Moreover the effect of resonator orientation on the frequency range and width of the stop-bands is also investigated. It is found that using auxiliary resonators can lead to stop-bands of local resonance (LR) nature in the frequency ranges, in which, the conventional structures are unable to attenuate wave propagation. Moreover, changing the orientation of the resonators, the dispersion curves can be altered and the stop-bands can be tuned. The results of the current manuscript can introduce resonator orientation as another degree of freedom in designing architected materials with tunable wave attenuation performance.
Keywords
architected materials, wave propagation, Finite Element Method, Bloch’s theorem