“唱歌铁氧体”振动规律的研究

doi:10.14139/j.cnki.cn22-1228.2022.03.007

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摘要

理论和实验研究了“唱歌铁氧体”的发声机理。利用杆的纵振动理论及线性磁致伸缩本构方程，计算了偏磁场条件下两端自由的铁氧体棒共振频率和位移、应力分布。测试了镍锌铁氧体棒纵振动模态、共振频率及振幅与电压的关系。对棒的测试结果表明，在一定偏置磁场作用下、一定大小的电压激励下，其振幅与电压呈近似线性关系，且当棒振幅达到 1 μm 以上，会出现雾化现象。激励电压为65 V，振幅达到 16 μm，棒将在中点处发生断裂。断裂位置与计算结果基本一致。

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	买子桐
	贺西平
	陈一凡
	汤衍鹏
	李增明
	张晨
	解邦鑫

关键词: 铁氧体磁致伸缩共振频率超声雾化

Abstract:

The sound generation mechanism of “singing ferrites”is studied，and the resonant frequency，displacement and stress distribution of the ferrite rods with free edges under the condition of bias magnetic field are calculated based on the longitudinal vibration theory and the linear magnetostrictive constitutive equations． The longitudinal vibration modes，resonant frequencies and the relation between amplitude and voltage of the three ferrite rods are tested．Experimental tests on rods show that the amplitude is approximately linear with the voltage within a certain bias magnetic field and a certain excitation voltage． Ultrasonic atomization will occur when the amplitude is greater than 1 μm． At the excitation voltage of 65 V，the amplitude can reach 16 μm， meanwhile the rod will break．The breakpoint position is basically consistent with that of the calculation．

Key words: ferrite magnetostrictive resonant frequency ultrasonic atomization

出版日期: 2022-06-25 发布日期: 2022-06-25 整期出版日期: 2022-06-25

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引用本文:

买子桐, 贺西平, 陈一凡, 汤衍鹏, 李增明, 张晨, 解邦鑫. “唱歌铁氧体”振动规律的研究 [J]. 大学物理实验, 2022, 35(3): 29-33.
MAI Zitong, HE Xiping, CHEN Yifan, TANG Yanpeng, LI Zengming, ZHANG Chen, XIE Bangxin. Study on the Singing Ferrites in Vibration . Physical Experiment of College, 2022, 35(3): 29-33.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2022.03.007 或 http://dawushiyan.jlict.edu.cn/CN/Y2022/V35/I3/29

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