Analysis of transient characteristics for shipborne piezoelectric ceramic of ultrasonic liquid level transducer

WANG Hao， HE Guo， MING Ting-feng
（Academy of Ship and Power Engineering， Naval University of Engineering， Wuhan 430033， China）

Abstract：It is difficult for the traditional analytical method to analyze the transient characteristics of piezoelectric ceramic. In order to solve the problem，the finite element method（FEM） was investigated. After introducing FEM theory，the solution to the key operation process were suggested，and the model of piezoelectric ceramic used for a certain type of marine ultrasonic liquid level transducer was built using the ANSYS software. On the condition of acoustic emission and the receiving，the effect on electro-mechanical transformation efficiency and the stress field profile of two forms of compressive stress was simulated separately. The results indicate that the electro-mechanical transformation efficiency can be raised by virtue of compressive stress of ring-shaped distribution，and the sensitivity of the transducer can be raised consequently. However，it causes the appearance of stress concentration and cycle.
Key words： piezoelectric ceramic； liquid level transducer； finite