3-2-2新型压电复合材料的有限元仿真

3-2-2 Finite Element Simulation of New Piezoelectric Composite Materials

摘要:

为了提升发射电压响应和机电耦合系数以提高压电性能，基于 1-3 型压电复合材料设计了一种 3-2-2 陶瓷-空气-聚合物新型复合材料。通过分析压电陶瓷阵列的理论机电特性，结合有限元仿真软件对敏感元件进行建模和物理场计算，确定敏感元件的发射电压响应和谐振频率，并对比不同尺寸对应的频率差异以确定聚合物最优尺寸。实验结果表明，相对于传统 1-3 型压电复合材料，3-2-2 型新型复合材料换能器的机电耦合系数提高了 0. 02，发射电压响应提高了 2 dB。因此，3-2-2 型新型复合材料有望开发出高性能压电换能器。

Abstract:

To enhance the emission voltage response and electromechanical coupling coefficient for improving the piezoelectric performance， a novel 3-2-2 ceramic-air-polymer composite is designed based on a 1-3 type piezoelectric composite. By analyzing the theoretical electromechanical properties of the piezoelectric ceramic arrays and combining the modeling of the sensitive elements with finite element simulation software and physical field calculations， the emission voltage response and resonance frequency of the sensitive elements are determined， and the frequency differences corresponding to different sizes are compared to determine the optimal size of the polymer. The experimental results show that the electromechanical coupling coefficient of the new 3-2-2 composite transducer is increased by 0. 02 and the emission voltage response is increased by 2 dB when compared with traditional 1-3 piezoelectric composite material. Therefore， a new 3-2-2 composite material is expected to develop a highperformance piezoelectric transducer.