Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Flexural wave propagation in metamaterial beams with beam-type resonators and eddy current damping
Submission Author:
Thiago de Paula Sales , SP
Co-Authors:
Matheus Basílio Rodrigues Fernandes, Thiago de Paula Sales, Domingos Rade
Presenter: Thiago de Paula Sales
doi://10.26678/ABCM.DINAME2023.DIN2023-0169
Abstract
It is well known from the literature that the vibration attenuation achieved in finite metamaterials increases as the number of unit cells increases. This leads to more natural frequencies within a given pass-band and, due to the periodicity of the dispersion diagram, they tend to cluster at its boundaries. This can be problematic, since in a narrow frequency range encompassing the end of an attenuation band and the beginning of a pass-band, one can move from a highly attenuated region to a region with large vibration transmissibility. In this context, this paper considers the use of localized eddy current-based dampers (ECDs) to enhance the attenuation performance of regions with a high density of natural frequencies. The effects of system parameters on the dispersion diagram and vibration transmissibility are investigated. The results show that ECDs are able to increase the vibration attenuation of metamaterial beams with beam-type resonators.
Keywords
elastic metamaterials, local resonators, eddy current damping
