周期性压电分流阵列板带隙特性研究

将带有分流电路的压电片周期性地粘贴到薄板表面形成二维压电分流阵列结构,该结构不仅具有声子晶体的带隙特性,还可以通过分流电路实现带隙调控。该文运用有限元法计算了二维压电分流阵列结构的带隙特性,研究了含有谐振单元及负电容的混合电路中不同电路参数对带隙的影响。此外,通过调节电感及负电容,可以将布喇格带隙和局域共振带隙进行耦合,拓宽带隙,实现宽频振动控制。

Study on Band Gap Characteristics of Periodic Piezoelectric Array with Shunting Circuits

A two dimensional piezoelectric shunting array structure can be formed by periodically attached the piezoelectric patches with shunting circuits on the surface of the thin plate. The structure not only possesses phononic band gaps characteristics, but also can realize band gap manipulation through the shunting circuit. In this paper, the finite element method is used to calculate the band gap characteristics of a two dimensional piezoelectric shunting array structure, and the influence of different circuit parameters on the band gap in a hybrid circuit with resonant elements and negative capacitors is studied. Furthermore, the local resonance band gap and Bragg band gap can be coupled to expand the band gap and achieve broadband vibration control by simply adjusting the inductance and negative capacitance.