Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Numerical investigation of a zig-zag beam-type quasi-periodic structure with multiple defects
Submission Author:
Thiago de Paula Sales , SP
Co-Authors:
Vinícius Santos, Thiago de Paula Sales
Presenter: Vinícius Santos
doi://10.26678/ABCM.DINAME2023.DIN2023-0170
Abstract
Periodic structures have been intensively studied lately, as they possess unusual behavior related to wave propagation that can be deeply explored in various academic and industrial applications. In this work, we investigate the dynamic behavior of a zig-zag beam-type quasi-periodic lattice, embedded with multiple geometrical “defects”, which break perfect periodicity of the mechanical system. The quasi-periodic structure is modeled using the wave-based finite element method (WFEM), duly modified to allow for distinct unit cells along the lattice. Results obtained from simulations show that the presence of two defective unit cells enables the formation of additional regions in which mechanical energy gets confined – which can be significant for energy harvesting applications, for example.
Keywords
quasi-periodicity, localized modes, multiple defects, WFEM
