Research on Optimization of Piezoelectric Composite Cantilever Beam Structure

Abstract

Piezoelectric composite structures have great significance for vibration control and energy harvesting technology. The piezoelectric effect of piezoelectric materials is used to convert mechanical energy into electrical energy based on the positive piezoelectric effect. The positive piezoelectric effect is related to the strain of the structure, which in the relative size and position of the structure affect the energy conversion efficiency. To study the influence of the relative size and relative position of the piezoelectric material and the cantilever beam base on the electric energy capture, a series of analyses, simulations, and experiments were carried out on the piezoelectric cantilever beam. Then, a novel piezoelectric composite structure with the first-order bending vibration was proposed, and the size and proportion of piezoelectric materials were determined. The structural prototype was fabricated, and the measurement system was constructed. The experimental results show that the novel piezoelectric composite structure can improve its electromechanical coupling characteristics, and is suitable for piezoelectric energy harvesting and passive vibration suppression technology.