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振动是一种很常见的物理现象，通过对振动能的收集，将振动能转换成电能，有利于缓解社会能源紧缺问题。目前主要用来收集振动能的压电发电装置可以在各种存在振动的环境中工作，具有很好的应用情境。而压电发电与无线网络传感器的结合，也使得其拥有更广阔的实用价值，且吸引了很多科研学者对其进行研究。
悬臂梁压电发电装置是现在最常见的振动能量采集装置，而这种装置的特点是结构简单，加工方便，可得到相对低的共振频率和较大的形变等。本文基于前人的结构设计，运用Solid-works进行三维建模,并通过ANSYS有限元软件对蝴蝶式悬臂梁发电装置进行了静力分析以及模态分析，求解其谐振频率，并将计算结果与试验数据进行了对比，以验证有限元计算的正确性。最后研究悬臂梁长度、宽度、厚度、形状等因素以及位移载荷对谐振频率的影响，最终确定最优化的结构设计参数。
 
关键词：振动，压电发电，有限元分析，结构优化

Abstract
 
Vibration is a very common physical phenomenon, by collecting the vibration energy of the vibration energy into electrical energy will help alleviate the social problems of energy shortage. At present is mainly used to collect the vibration energy of piezoelectric power generation device can exist in a variety of vibration environment work, has the very good application situation. While the piezoelectric power generation combined with the wireless sensor networks also make it have more practical value, and attracted a lot of research scholars to study it.
Cantilever piezoelectric power generation device is now the most common vibration energy collection device, and the characteristic of the device is simple in structure, convenient processing, can be relatively low resonance frequency and larger deformation etc. In this paper, based on previous structural design, Using Solid-works make three-dimensional modeling and the butterfly type cantilever beam generating device for static analysis and modal analysis by ANSYS finite element software to solve the problem of the resonant frequency, and the calculated results were compared with experimental data, to verify the correctness of the finite element calculation .Finally, study of cantilever factors such as length, width, thickness, shape and displacement loading effect on the resonance frequency, and ultimately determine the optimal design parameters.
 
Key words： Vibration，Piezoelectric Power Generation Technology，FEA，Structural Optimization