带质量块压电悬臂梁的振动仿真分析
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摘要
基于压电方程和弹性梁的振动理论,建立了带质量块的单晶悬臂梁压电发电振子的理论模型,运用Ansys仿真分析了质量块对固有频率和输出电压的影响。结果表明:质量块长度与压电振子长度比为1/2左右时压电振子固有频率最小,输出电压出现峰值;固有频率和输出电压随质量块厚度的增加分别呈现减小和增大的趋势;质量块存在一个最佳粘贴位置,使得固有频率最小,输出电压最大。
Based on the piezoelectric equation and the vibration theory of elastic beam, the theoretical model of single crystal cantilever piezoelectric generator with mass block is established. the influence of mass block on natural frequency and output voltage is analyzed by Ansys simulation. The results show that when the ratio of mass block length to piezoelectric vibrator length is about 1/2, the natural frequency of piezoelectric vibrator is the smallest and the output voltage reaches the peak value, and the natural frequency and output voltage decrease and increase with the increase of mass block thickness, respectively. There is an optimal paste position for the mass block, which minimizes the natural frequency and maximizes the output voltage.
Based on the piezoelectric equation and the vibration theory of elastic beam, the theoretical model of single crystal cantilever piezoelectric generator with mass block is established. the influence of mass block on natural frequency and output voltage is analyzed by Ansys simulation. The results show that when the ratio of mass block length to piezoelectric vibrator length is about 1/2, the natural frequency of piezoelectric vibrator is the smallest and the output voltage reaches the peak value, and the natural frequency and output voltage decrease and increase with the increase of mass block thickness, respectively. There is an optimal paste position for the mass block, which minimizes the natural frequency and maximizes the output voltage.
引文
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[2]成立,李茂军,王鼎湘,等.基于压电效应的风力发电方法研究[J].压电与声光,2015,37(02):361-364.
[3]王威,马爽,韩都,等.静电纺丝法制备服装用PVDF压电传感器[J].仪表技术与传感器,2017(10):123-126.
[4]杜小振,曾祥伟,卞丰,等.MEMS自供能压电电磁集成发电研究现状[J].微纳电子技术,2014,51(03):161-167.
[5]张允,王战江,蒋淑兰,等.振动能量收集技术的研究现状与展望[J].机械科学与技术,2018:1-31.
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