Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Vibration attenuation and chaos in periodic lattices with bi-stable resonators
Submission Author:
André Albuquerque Thomas e Brandão , DF
Co-Authors:
André Albuquerque Thomas e Brandão, Aline Souza de Paula, Adriano Todorovic Fabro
Presenter: André Albuquerque Thomas e Brandão
doi://10.26678/ABCM.DINAME2023.DIN2023-0039
Abstract
The interest for the study of metamaterials and metastructures has been rapidly increasing in the scientific community. A number of different approaches for the configuration of such systems have already shown to produce unique and potentially useful dynamic behaviour, such as broadband vibration attenuation. Locally resonant metamaterials are of special interest in this domain because of their versatility in creating wide bandgaps for wave propagation while being relatively simple in terms of analysis and mechanical design. Most remarkably, nonlinear metamaterials have been attracting increasing research interest due to their interesting enhanced vibration attenuation capabilities. This work presents an investigation of a nonlinear periodic metamaterial attached to a main structure with aiming at understanding the mechanisms responsible for such enhanced attenuation characteristics. An analysis of the frequency response content ultimately reveals that chaotic behavior arising from an arrangement of bistable resonators can produce broadband vibration attenuation on a simple 1-D periodic lattice system.
Keywords
nonlinear metastructures, Vibration Attenuation, chaos, bi-stable resonators
