Design of tunable shunt rainbow trap smart beam for multi-frequency vibration attenuation

Resumo

This paper analyzes a strategy for tunable, broadband vibration attenuation in electro mechanics alone-
dimension guided wave coupled with shunted piezoelectric. The piezo patches are in periodic arrays over the beam.

They are connected in shunt circuits that resonate at distinct neighbouring frequencies, creating a tunable rainbow
trap capable of attenuating vibration with broadband characteristics. Based on the effect of electrical energy
dissipation, the shunt circuit connection is applied to provide damping in the system vibration. An efficient method
to model and analyze the dynamic of structures is the spectral elements method (SEM). Although, a single spectral
element can model geometrically uniform members. Therefore, it can reduce the total number significantly in the
mesh. Results show the efficiency in attenuating vibrations over a broad frequency range can be obtained by tuning
different shunt circuits to resonate at different frequencies, which create a tunable rainbow trap.