压电加速度传感器有限元仿真方法研究

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.