基于ANSYS的压电陶瓷PLZT特性仿真分析

针对传统的解析法和有限元法在压电陶瓷分析中的弊端,采用有限元软件ANSYS对压电陶瓷掺镧锆钛酸铅(PLZT)进行特性分析.介绍了大型有限元分析软件ANSYS及其耦合场分析功能,建立了PLZT的ANSYS模型用于分析单片、叠层和双晶片型PLZT的静动态特性.单片PLZT的输出位移与所加电压和外力载荷均成线性关系;叠层结构的输出位移因粘结层的变形而小于理论输出值;双晶片变形的ANSYS计算结果同理论分析很相近.进行压电器件分析时,可先通过ANSYS软件建立实体模型,设定几何尺寸和材料特性参数进行性能仿真,并且针对不同器件只需修改参数,程序通用性好.

Analysis of piezoelectric ceramics PLZT based on ANSYS

In order to avoid the defect in traditional analytic method and the finite element analysis(FEA)used in the analysis of piezoelectric ceramics,FEA software ANSYS was introduced to analyze the characteristics of lanthanum-modified lead zirconate titanate(PLZT) ceramics.The software ANSYS and its coupled-field analysis function were introduced.The ANSYS model of PLZT was built and based on the model the static and dynamic performances of unilateralism,multilayer and bimorph PLZT were analyzed.The displacement output of unilateralism was linear with applied voltage and force load.The displacement output of multilayer was less than the theoretical output because of the deformation of the adhesive layer between each two layers of PLZT.The deformable magnitude of bimorph calculated with ANSYS was very close to the theoretical results by comparing with each other.So ANSYS software can be used to build solid models, employ geometrical dimensions and material characteristic parameters at piezoelectric devices analyses.Aiming at different devices,it just needs modify parameters,and the program has good currency.