Análise da formação de Band Gaps em estruturas periódicas utilizando o método do elemento espectral

Abstract

The Vibration reduction using periodic structures has been, nowadays, a very important topic in engineering. This idea has been applied in the projects of satellite panels, aircraft fuselage and wings, lattice structures, ducts, train tracks, among others. Periodic bar designs can be employed to alter the propagation of waves passing through structures, introducing a filter-like effect. Waves can propagate along the structure only within specific frequency bands known as the "pass band", being blocked in the frequency bands called "stop bands". In this context, the present work aims to analyze the frequency bands using the spectral element method, which differs from the finite element method in the discretization of the structure, which reduces errors and computation costs, generating a more accurate result.