基于力电耦合模拟的压电悬臂板波激振动获能研究

Energy acquisition of wave induced vibration of piezoelectric cantilever plate based on electro-mechanical coupled simulation

采用数值模拟的方法,研究了压电悬臂板在线性深水波激发下的振动获能机理。首先运用数值波浪水槽计算出了三维压电悬臂板所受的波浪时程荷载,然后采用力电耦合模拟的方法,研究了板的振动规律和不同粘贴位置压电材料的输出电压,该力电耦合模拟方法考虑了压电材料的贴合和压电材料的压电效应对压电悬臂板振动的影响。通过对不同物理参数下压电悬臂板振动获能机制的计算分析,得出了对板振动和获能的关键影响因素以及提高获能效率的通用方法,揭示了波浪运动与振动获能的关系。

Here,wave-induced vibration energy harvesting mechanism of piezoelectric cantilever plate excited by linear deep-water wave was studied using numerical simulation.Firstly,wave time history load on a 3-D piezoelectric cantilever plate was calculated by using numerical wave tank,and then vibration laws of the plate and output voltages of piezoelectric materials with different bonding positions were studied by using the electro-mechanical coupled simulation method.The electro-mechanical coupled simulation method could consider effects of bonding of piezoelectric material and its piezoelectric effect on vibration of piezoelectric cantilever plate.Through calculation and analysis for vibration energy acquisition mechanism of piezoelectric cantilever plate under different physical parameters,key affecting factors of plate vibration and energy acquisition and the general method to improve energy acquisition efficiency were obtained,and the relation between wave motion and vibration energy acquisition was revealed.