波浪激励下柔性压电发电装置的研究

Research on flexible piezoelectric power generationassembly excited by waves

为研究激励作用下柔性压电发电装置的输出电压,基于数值波浪水槽,开展了不同距离条件下串列放置、单晶/双晶串联、双晶并联等不同样式柔性压电发电装置与波浪的双向耦合分析。研究表明:波浪作用下压电发电装置能够输出稳定电压;压电片摆动周期与波的周期相同;两压电片摆动相位差与其串列排布的距离有关,在所选择的波浪条件下,距离400 mm时输出电压最大;单晶与双晶并联压电片电压基本一致且为双晶串联电压的50%;无论单晶或者双晶、并联或者串联,当压电发电装置的长度为125 mm时都能得到最大输出电压。

In order to study on output voltage of flexible piezoelectric power generation assembly excited by waves,based on numerical wave flume,the two-way coupling analysis of different styles of flexible piezoelectric energy harvester and waves,such as tandem placement at different distances,unimorph,bimorph series,and bimorph parallel are carried out.The results shows the harvester can output a stable voltage under the action of waves;the swing period of the piezoelectric sheet is the same as the period of the wave,and the swing phase difference between the two piezoelectric sheets is related to the distance between the piezoelectric sheets arranged in series.Under the selected wave conditions,the output voltage is the largest when the distance is 400 mm;the voltage of the unimorph and bimorph parallel is basically the same as half of the bimorph series;regardless of unimorph or bimorph,parallel or series,the maximum output voltage of the piezoelectric power generation assembly is obtained when the length is 125 mm.