基于压电陶瓷的等变厚度悬臂梁特性研究

以等、变厚度悬臂梁为研究对象,以单轴向玻璃纤维为基体材料结合压电陶瓷片设计出智能悬臂梁模型。利用数值模拟与实验相结合的方法分析了压电陶瓷片对悬臂梁模态频率、自由端最大位移及应变分布的影响。结果表明,未加电压情况下,增加压电陶瓷铺设数目能有效增大悬臂梁固有频率,减小自由端最大位移,但对应变分布无显著影响;施加电压时,可进一步减小悬臂梁自由端最大位移,亦可减小各监测点应变值。

Research on Characteristics of Uniform and Variable Thickness Cantilever Beam Based on Piezoelectric Ceramics

An intelligent cantilever beam model with uniform and variable thickness is designed with uniaxial glass fiber as matrix material and piezoelectric ceramic plate as the research object. The effects of piezoelectric ceramic plates on the modal frequency, the maximum displacement of the unconstrained end and strain distribution of cantilever beam are analyzed by using a method combining numerical simulation with experiment. The results show that increasing the number of PZT laying can effectively increase the natural frequency of the cantilever beam and reduce the maximum displacement of the free end, but it has no significant effect on the strain distribution. When the voltage is applied, the maximum displacement at the free end of the cantilever beam can be further reduced and the strain value at each monitoring point can also be reduced.