Vibration attenuation in a graded metamaterial rod

Resumo

In this work, a broadband vibration attenuation approach using a graded metamaterial rod is proposed.
A set of spring-mass local resonators with different spacing are attached to an elastic rod to obtain a graded
metamaterial rod. Instead of a single local resonator, two or more integrated resonators are used in each unit cell.
The Finite Element (FE) method and the Spectral Element(SE) method are used to model the graded metamaterial
rod. A simulated study is conducted to investigate the effects of the length spacing in the graded metamaterial rod.
Simulated example results in terms of attenuation constant, frequency response function (FRFs), transmittance and
dispersion diagram are presented and discussed.