Structural design of a piezoelectric meta-structure with nonlinear electrical Bi-link networks for elastic wave control

Bin Bao (1) , Mickaël Lallart (2) , Daniel Guyomar (2)

1 SUSTech - Southern University of Science and Technology
2 LGEF - Laboratoire de Génie Electrique et Ferroélectricité

This study reports a structural optimization work of a piezoelectric meta-structure with nonlinear electrical switched Bi-link electronic networks for adaptive wave propagation manipulation and vibration control applications. The investigated meta-structure consists in a periodic arrangement of elementary cells shaping the beam substructure, each of these comprising two piezoelectric elements with connected electrical terminals through semi-passive nonlinear electrical interface, which therefore forms the so-called Bi-link electrical connection. In order to optimize the investigated structure for wave propagation control, the effects of adjusting the geometric/material parameters and locations of the two piezoelectric elements in one periodic cell are analyzed and summarized in detail. Four kinds of structural optimization methods including eighteen structural optimization sub-methods for the open circuit condition and the SSDI Bi-link condition are concluded and discussed in this research. Results show that the performance of these new resonant-type band gaps can be manipulated to meet the targeted aim in terms of wave propagation characteristics in different frequency domains by proper tuning of the investigated parameters.

Mots clés: elastic wave propagation; meta-structure; phononic; synchronized switching damping piezoelectric.

Domaines: Sciences de l'ingénieur [physics]

Bin Bao, Mickaël Lallart, Daniel Guyomar. Structural design of a piezoelectric meta-structure with nonlinear electrical Bi-link networks for elastic wave control. International Journal of Mechanical Sciences, 2020, 181, pp.105730. ⟨10.1016/j.ijmecsci.2020.105730⟩. ⟨hal-03214063⟩