摘要主要研究了边棱音耦合振动机制和边棱音-压电振动发电机发电特性。使用由 MEAS 公司生产的 PVDF 压电片,设计了一种利用冲击射流不稳定性的振动机理的悬臂梁式风能 压电发电结构。进行实验和仿真分析。利用示波器和高速摄影进行测量,获得边棱音耦合 振动频率、振幅特性和电压特性。结果表明振动频率在一定范围小风速内趋于稳定,随着 风速的增加频率增大,增大到峰值后突然降低到较小值,然后再次趋于稳定。振幅随着风 速的增加小幅度增加,在达到某一风速值时突然激增到某一值,然后趋于稳定。输出电压 的变化与振幅变化具有相似性。探究了该振动发电机输出功率的主要影响因素,结果表明 风速和负载电阻对输出功率均有影响。77323
毕业论文关键词 压电 振动 发电机 PVDF
Title Bypiezoelectric wind turbines
Abstract We studied the edge-tone coupled vibration mechanism and edge tones - piezoelectric vibration generators properties。 By using PVDF piezoelectric sheet produced by MEAS company, we designed a piezoelectric cantilever wind power generation structure by using shock and vibration mechanism of jet instability。 We use the model simulation software, then do experiments。 By measuring the voltage frequency and using High-speed photographic apparatus, we obtain edge-tone coupled vibration frequency and amplitude characteristics。 The results show that the vibration frequency within a certain range of small wind speed stabilized, and the frequency increases with the wind speed increases。 When increases to a peak and then suddenly reduced to a smaller value, and then stabilized。 With the increase of wind speed increases the amplitude of the piezoelectric sheet small amplitude, when the wind speed reaches a certain value of the amplitude of the piezoelectric sheet suddenly shoots up to a certain value, then stabilized。 We explores the main factors affecting the vibration generator output power, and the results show that both the average wind speed and load resistance affect the output power。
Keywords piezoelectricity vibration generator PVDF
本科毕业设计说明书 第 I 页
目 次
1 引言 1
1。1 研究背景及意义 1
1。3 本章小结 6
2 实验台的设计与搭建 7
2。1 实验台的设计 7
2。2 实验台的搭建 8
3 实验结果与分析 11
3。1 振动频率与风速的关系 11
3。2 振幅特性与风速的关系 11
3。3 输出电压与风速的关系 12
3。4 影响输出功率的因素 13
4 仿真与分析 16
4。1 探究双向流固耦合的方法