Numerical Simulation Analysis of Piezoelectric Energy Harvester Based on Periodic Perforated Cantilever
To solve the problem that miniature sensors such as ocean monitoring cannot be powered stably for a long time,piezoelectric energy harvester provides a newway.In this paper,a piezoelectric energy harvester based on periodic perforated beam is proposed,which can convert the vibrational ener-gy from clean energy sources such as waves into electrical energy.Firstly,the electromechanical fre-quency response function of the piezoelectric energy harvester is established.On the basis of the theoret-ical analysis,the sensitivity analysis of the parameters related to the perforated substrate is carried out.Finally,a numerical simulation analysis is conducted using the finite element method.The results show that the thickness and filling rate of the substrate have the highest correlation with the peak voltage,and the number of perforations has the lowest correlation with the peak voltage.The smaller the thickness and filling rate of the substrate and the more the number of perforations,the better it is to reduce the resonant frequency and increase the peak voltage.The simulation results show that the perforated struc-ture reduces the resonant frequency by 22.63％and increases the peak voltage by 61.54％compared with the conventional non-perforated structure.
self-powered ocean sensorspiezoelectric energy harvesterperiodic perforated cantilever beamparameter sensitivityresonant frequencypeak voltage
万方数据
维普
