压电元件的机械阻抗及在被动控制中的应用  

Mechanical Impedance of Piezoelectric Element and Its Application to Passive Vibration Control

作　　者：潘公宇[1] 潘秋华[2] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]华东船舶工业学院数理系,镇江212003

出　　处：《振动工程学报》2003年第4期472-475,共4页Journal of Vibration Engineering

摘　　要：从分析压电元件的机械阻抗出发 ,推导出具有外部电路压电元件系统的机械阻抗与电气阻抗的关系 ;得到了具有压电元件减振系统主系统的传递函数。用解动力减振器最优值的方法求得了具有最大减振效果时 L R外部电路的最佳值。实验验证了具有外部电路压电元件系统的减振效果。结果表明 :将最佳 L R外部电路压电元件减振系统用于两端支持的简支梁时 ,其一阶模态的减振效果达到 19dBased on mechanical impedance, the relationship between the me chanical impedance and electric impedance of piezoelectric elements with externa l circuit is analyzed. The transmissibility of main system with piezoelectric pa ssive absorber is obtained on the basis of mechanical impedance. Optimal v alues of LR external circuit with maximum absorbing effect are studied wit h a method similar to optimum solution of dynamic vibration absorber. Absorbin g effect of piezoelectric elements with external circuit is confirmed in expe riment. The results show that when a piezoelectric passive absorber wit h optimal values of LR external circuit is used in the beam vibration control, the peak of transmissibility decreases by 19 dB.

关 键 词：压电元件 机械阻抗 被动控制 振动控制 智能材料 

分 类 号：TB535[理学—物理]