Meanwhile the change of the voltage by the change of the length will decrease when the thickness of the piezoelectriclayer decrease.
压电传感器长度增加，输出电压也会有所增加，并且这一变化会随压电片的厚度减少而减小。
2
Simply flanking the piezoelectriclayer with thin concentric layers of metal would not work because metals tend to have a low viscosity.
仅仅在两侧安放压电层和薄薄的同心金属层是起不了多大作用的，因为金属的粘度很低。
3
To consider the effect of bonding characteristics of the adhesives between the piezoelectriclayer and the functionally graded ones, a linear spring layer model is adopted.