压电陶瓷的电场平行于波的传播方向的三种常用振动模如图1所示.由相应的压电方程,采用与文章相似的方法可得到它们的等效图,如图2所示.由于篇幅所限推导过程和图2中各元件的表达式从略. 自由振动时的等效电路图可简化成图3.图中各元件值,对电场平行于传播方向的厚度剪切片为: Piezoelectric ceramic electric field parallel to the wave propagation direction of the three commonly used vibration mode shown in Figure 1. From the corresponding piezoelectric equations, using methods similar to the article can be obtained their equivalent diagram, shown in Figure 2. Due to The length of the limited derivation process and the expression of each component in Figure 2. The free vibration of the equivalent circuit diagram can be simplified into Figure 3. The value of the components in the figure, the electric field parallel to the thickness of the propagation direction Shear: