Simulation And Analysis On Multi-field Coupling Problem Of Piezoelectricity Acoustic Waves Devices Using ANSYS

Piezoelectricity acoustic wave devices are one of the important high-frequency devices of wave-source that can radiate sound waves into the surrounding air. They work based on anti-piezoelectric effect, which converts electric signal into mechanical vibrations and sound waves. Piezoelectricity acoustic wave devices have a board important applications in the atmosphere of aerospace, defense, machinery and electronics. In this thesis, we analyzed the piezoelectric-structure-acoustic couplings of a cylindrical shaped piezoelectric acoustic wave device using the commercial finite element software of ANSYS.The piezoelectric-structure coupling elements and fluid-solid coupling elements in ANSYS are used during the FEM analysis. The direct coupling method is adopted through our analysis. We take into account the thickness and the size of piezoelectric patches, as well as factors such as the applied voltage which can influence the dynamic response of the piezoelectric-structure-acoustic coupling system and the sound pressure in the air sphere surrounding the device. Results are given in the form of curves which reflect how the geometric parameters influence this device's capabilities. In the end, we present the simulation and analysis of the piezoelectric-structure-acoustic couplings within mediums in the devices.