基于压电悬臂梁的振动能量获取装置的建模及数值仿真  

MODELING AND NUMERICAL SIMULATION OF PIEZOELECTRIC CANTILEVER BEAM DEVICE USED IN HARVESTING VIBRATION ENERGY

作　　者：周璇[1] 王海[1] 李晗[1] 王战[1] 夏小品[1] 

机构地区：[1]安徽工程大学机械与汽车工程学院,安徽芜湖241000

出　　处：《巢湖学院学报》2013年第3期98-102,共5页Journal of Chaohu University

摘　　要：振动能是自然环境中广泛存在的一种能量,振动式发电机可将其提取并转换为可直接利用的电能。设计了一种用于收集环境中低频振动能的三质量块压电悬臂梁装置,利用压电薄膜的正压电效应将机械能转化成电能。建立悬臂梁的数学模型,用ANSYS软件建立悬臂梁的仿真模型,然后对其进行模态分析,耦合分析,谐响应分析并绘制出压电振子的频率-电压曲线图。研究结果表明该悬臂梁产生的电压可以满足无线传感器节点的使用要求,且优于单质量块悬臂梁。Vibration generator can extract and convert vibration energy that exists in the natural environment into electric power.A design proposal of a piezoelectric cantilever beam with three mass blocks makes use of direct piezoelectric effect to extract low-frequency vibration energy.This paper is aimed at establishing the mathematical model of the cantilever beam,using ANSYS software to establish the simulation model of the beam,and then using the modal analysis,coupling analysis,harmonic response analysis and it maps out the curve of frequency-voltage.The results shows that Piezoelectric Cantilever Beam with three mass blocks is superior to only one mass block,and the voltage generated from the cantilever beam can satisfy wireless sensor nodes.

关 键 词：振动能 压电悬臂梁 三质量块 ANSYS 

分 类 号：TK9[动力工程及工程热物理]