变负载压电悬臂梁共振频移量研究

发布时间：2018-07-05 04:20

本文选题：能量回收 + 压电悬臂梁　；参考：《压电与声光》2017年02期

【摘要】：基于Euler-Bernoulli梁原理研究了铝基双晶串联压电悬臂梁电压频响和短路-开路共振频移量问题。以悬臂梁总厚度和压电陶瓷厚度为影响参数,首先推导了输出电压的单/多模态解,再以单模态解为基础,分析了不同厚度压电悬臂梁短路-开路共振频移量。研究结果表明,与多模态解相比,单模态解的估计性良好,且计算简便。在任意变负载区间内,存在最劣压电陶瓷厚度,使短路-开路共振频移量最大。因此,在进行压电悬臂梁结构设计时,应尽量避开最劣点,使外部负载具有最佳适应性,提高能量回收效率。
[Abstract]:Based on the Euler-Bernoulli beam principle, the voltage frequency response and short-circuit open-circuit resonance frequency shift of aluminum based double-crystal series piezoelectric cantilever beam are studied. Taking the total thickness of cantilever beam and the thickness of piezoelectric ceramic as the influence parameters, the single / multimodal solution of output voltage is derived, and then the short-circuit open-circuit resonance frequency shift of piezoelectric cantilever with different thickness is analyzed based on the single-mode solution. The results show that compared with the multimodal solution, the single-mode solution has good estimability and is easy to calculate. In any range of variable loads, there is the worst thickness of piezoelectric ceramics, which results in the maximum frequency shift of short-circuit and open-circuit resonance. Therefore, in the design of piezoelectric cantilever structure, the worst point should be avoided as far as possible, so that the external load has the best adaptability and the efficiency of energy recovery should be improved.
【作者单位】：上海工程技术大学汽车工程学院;
【基金】：上海市自然科学基金资助项目(14ZR1418600) 国家自然科学基金资助项目(51175320,51675324)
【分类号】：TN384

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