基于平面应变假设,推导了径向极化压电陶瓷管在外电场作用下形变的计算公式.作为挤压式喷嘴的执行器,径向极化压电陶瓷管在与极化方向一致的外电场的作用下主要发生径向变形.利用有限元分析软件ANSYS14.0,对模型进行有限元仿真.利用这两种方法计算不同结构尺寸的压电陶瓷管在100 V电压作用下的内壁径向位移,两种方法计算结果之差小于5%,结果的一致性,验证了理论公式的正确性.该理论分析模型可预测挤压式压电喷嘴在外电场作用下的响应,指导喷嘴结构设计,降低喷嘴设计成本,提高喷嘴结构设计可靠性和设计效率.
Based on plane strain hypothesis, radial displacement formula of polarized piezo ceramic cylinder excited by radial electric fieldwas derived. Radial polarized piezo ceramic cylinder, which is actuator of squeeze-mode piezoelectric inkjet printhead, perform mainly radial deformation under radial external electric field. Finite element (FE) simulationwas also carried out using the software of ANSYS 14.0. Inner surface radial displacements of different piezo tubeswere analyzed using the two methodsat 100 V. The difference between results of the analytic formula and FE simulation is less than 5%. Consistent results of two different methods verify qualification of the derived formula. The analytic model could be used to predict the response of squeeze-mode inkjet printer under external electric field, reduce design costs and improve design reliability and efficiency.