压电加速度传感器具有频带宽，结构简单，耐高温性能好等特点，在复杂机械应力和高温应力环境下应用广泛，是航空发动机健康监测、爆炸冲击监测等应用下必不可缺的器件。对于压电加速度传感器的设计和研究，常使用有限元仿真法来分析其固有频率、响应及在此基础上的各种机械应力、温度应力下的状态。从压电加速度传感器的原理、结构和有限元仿真的基本流程出发，调研了压电加速度传感器有限元仿真中的主要问题。按照不同结构类型总结了建立几何模型时的结构简化方法，分析了螺栓预紧力的主要仿真方法；区分部分仿真和整体仿真，总结了固有频率的仿真方法；按照不同激励，讨论了不同应力的仿真实现方法。

The piezoelectric acceleration sensor has the features of wide frequency bandwidth, simple structure and good hightemperature performance resistance and has wide applications in the complex mechanical stress and high temperature stress environment. And it is an indispensable device in special application like aeroengine health monitoring and explosion impact monitoring. For the design and research of piezoelectric acceleration sensors, the finite element simulation is often used to analyze their natural frequency, response and the status under mechanical and thermal stresses. Based on the principle, structure and the basic flow of finite element simulation of the piezoelectric acceleration sensors, the main problems in finite element simulation of piezoelectric acceleration sensor were investigated. According to different types of structures, the structural simplification methods in geometric modeling were concluded. The main simulation methods for bolt pretension were analyzed. The partial simulation and overall simulation were distinguished and the simulation methods of the natural frequency were summarized. The simulation methods for different stresses were discussed according to different excitations.

TN384;TM22;TH825

国防科工局技术基础科研基金资助项目(JSZL2016601b007)