粘结层厚度对叠层压电振子的影响分析

Effect of Adhesive Bonds on Triple Layer Piezoelectric Vibrators

利用压电振子采集环境振动能量为低功耗电子产品供能是近年研究的热点,而叠层压电振子中,粘结层厚度对压电振子的发电能力以及压电振子的抗剪性能均有较大影响。文中针对悬臂梁叠层压电振子,利用ANSYS软件仿真分析了其粘结层厚度不同时对于压电振子的输出电压、固有频率以及抗剪性能的变化关系。结果表明,在相同条件下,随着粘结层厚度的增加,压电振子的开路电压有一定程度的减小、基频基本成线性增加,但其结合面上的切应力却有较大程度的减小(最大为40%)。

The thickness of adhesive layer had great influence on the generating capacity and the shearing capacity of triple layer piezoelectric vibrators. In this paper, the analysis models were established to simulate the influence of the change of the different thicknessess of adhesive layer for the output voltage, the frequency and the shearing capacity of piezoelectric cantilever beam by using ANSYS software. The research results showed that the output voltage of piezoelectric vibrators was reduced partly with the increase of the layer thickness. In the meantime, the fundamental frequency had basically increased linearly while the shear stress of the faying surface had a greater decrease （ up to 40% ）.