复合L形宽频压电悬臂梁的建模与仿真  

Modeling and Simulation Analysis for a L-shaped Wideband Piezoelectric Cantilever Beam

作　　者：王光庆[1] 鲍鹏[1] 陆跃明[1] 

机构地区：[1]浙江工商大学,杭州310018

出　　处：《中国机械工程》2013年第14期1933-1938,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51277165);浙江省自然科学基金资助项目(Y1080037);浙江省教育厅资助项目(Y201223050);浙江省高校优秀青年教师计划资助项目;浙江工商大学青年人才基金资助项目

摘　　要：为提高单频压电悬臂梁的振动能量采集转换效率,提出一种复合L形压电悬臂梁的宽频拓展技术,通过在单频压电悬臂梁水平结构中增加一个辅助垂直悬臂梁,组成L形压电悬臂梁,通过控制L形压电悬臂梁的结构和材料参数使悬臂梁的2阶模态频率为1阶模态频率的2倍,将1阶、2阶模态频率串联起来形成一个宽频的谐振带。利用拉格朗日方程和模态假设法建立了L形压电悬臂梁的频率方程和振动方程,通过数值仿真分析了L形压电悬臂梁结构和材料参数对其频率特性和振动特性的影响,并确定了系统的最佳结构和材料参数,实例验证了悬臂梁宽频拓展方法的正确性。In order to improve the transfer efficiency of the traditional single-frequency piezoelectric cantilever beam used in the energy harvesting technologies（EHT）,an L-shaped piezoelectric cantilever beam,which was composed by a horizontal beam and a vertical beam,was proposed to wideband the frequency performance.The frequency-band was expanded by optimizing the structure and material parameters to reduce the distance between the 1st modal frequency and the 2nd modal frequency.The frequency equation and the vibration equation were derived according to Lagrange function and modal assumed method.The effects of the structure and material parameters on the frequency characteristics and the vibration characteristics were studied by numerical simulations.

关 键 词：宽频 L形压电悬臂梁 频率特性 振动特性 能量采集器 

分 类 号：TM356[电气工程—电机]