Optimized Structure Design of a Bridge-like Piezoelectric Energy Harvester Based on Finite Element Analysis

摘要

A bridge-like piezoelectric energy harvester which can be used for energy harvesting on large force load occasions is proposed in this paper. The harvester consists of two parts: piezoelectric stack and a bridge-like amplification mechanism. Basic w orking principles of the structure are elaborated in details. Finite element analysis based design is introduced in this paper to achieve higher output power as well as higher energy transmission efficiency. In order to realize an optimized structure, many influencing factors such as material parameters, dimension parameters, the layout of piezoelectric stack and stack connections are considered and analyzed.