摘要
本文通过由平衡位置到最大位移以及由最大位移到平衡位置的两个四分之一周期中外力作功的定量计算,根据功能原理,得到了各种情况下受迫振动的振幅均小于位移共振的振幅以及受迫振动的振幅虽与强迫力频率有关但却稳定的结论,并给出了速度共振的振幅表达式.
The amplitude of forced vibration is always smaller than the amplitude ofdisplace-ment resonance.The amplitude of forced vibration remains constant regardless its relation toan imposed force. Both of these conclusions are demonstated by the calculation of extemalwork. Moreover,the presentation about the amplitude of velocity resonance is proved.
出处
《大学物理》
北大核心
1994年第11期5-8,31,共5页
College Physics
关键词
受迫振动
位移共振
速度共振
振幅
forced vibration; displaeement resonanee; velocity resonance