Abatract:Composite piezoelectric materials were used to optimize and adjust the power generation performance,stiffness,and vibration characteristics of the piezoelectric energy harvester.The piezoelectric material PZT-51 and PVDF were introduced into the single crystal piezoelectric sheet of PZT-5H.The piezoelectric structure can affect the mechanical stiffness of the material.The vibration characteristics of the piezoelectric structure were optimized through modal analysis.The results show that optimized piezoelectric structure can fully take advantage of its electromechanical properties and improve its adaptability to the piezoelectric energy harvester in complex working scenarios.Piezoelectric material PZT-51 can effectively improve the stiffness of the piezoelectric energy harvester.And the PVDF can effectively adjust the first-order natural frequency of the piezoelectric structure from 54 Hz to 115 Hz,which helps tune the performance parameters of the piezoelectric energy harvester.
关键词
压电材料/刚度/力电性能/特征频率
Key words
piezoelectric material/stiffness/electromechanical property/characteristic frequency
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