压电超材料单元设计及在弹性梁 减振中的应用

Metamaterial is a type of composite material structure, in which a cell is repeated periodically with different materials integrated. Owing to the phenomenon that metamaterial structures can form a bandgap in spectrum and make the elastic wave propagation confined in it, they has attracted attentions in the fields of noise and vibration control. In this paper, we proposed a piezoelectric metamarerial, in which a piezoelectric material and a oscillate circuit form the cell. From the theoretical analysis, it is proved that the frequency band gap is generated. Furthermore, this kind of piezoelectric metamaterial is put on a cantilever beam to show the effect of vibration attenuation. The simulation investigation is carried out, including the studies on the vibration energy absorption , the influence of resistance and the vibration attenuation characteristic ( combined with the voltage curve on PZT) . The results focus on the significance of transmission and voltage, and show that the piezoelectric metamaterial is effective in vibration attenuation.