大学物理 ›› 2017, Vol. 36 ›› Issue (10): 65-67.doi: 10. 16854 /j. cnki. 1000-0712. 2017. 10. 016

• 大学生园地 • 上一篇    下一篇

音叉受迫振动与共振现象的研究

张慧,康秀英   

  1. 北京师范大学物理学系,北京100875
  • 出版日期:2017-10-20 发布日期:2017-10-20
  • 作者简介:张慧( 1993—) ,女,重庆人,北京师范大学物理学系2016 级本科生.

Research on tuning Fork's forced vibration and resonance phenomenon

ZHANG Hui,KANG Xiu-ying   

  1. Department of Physics,Beijing Normal University,Beijing 100875,China
  • Online:2017-10-20 Published:2017-10-20

摘要: 研究了在不同测试条件下音叉的受迫振动与共振的规律. 实验结果表明: 音叉的共振频率与音叉双臂质量分布有关,所加的质量块越靠近音叉的节点,共振频率变得越小; 改变磁性阻尼的大小,阻尼越大,共振频率和幅度越小; 当驱动线圈与接收线圈同时向音叉节点处移动时,音叉幅频特性曲线的共振幅度逐渐减小,但共振频率逐渐增大. 如果保持驱动线圈位置不变,接收线圈向音叉节点处移动时,共振频率基本保持不变,而共振幅度越来越小.

关键词: 音叉, 受迫振动, 共振频率

Abstract: The law of tuning fork's forced vibration and resonance phenomena are studied experimentally. The results show that the resonance frequency is affected by the tuning fork's mass distribution,damping,and position of driving coil and receiving coil.

Key words: tuning fork, forced vibration, resonance frequency