共振演示实验的纰缪与装置的改进

Commenting on the resonance demonstrating experiment and improving the device

针对高中物理教科书中共振现象的演示实验装置存在着纰缪,在大学物理实验弹簧振子的受迫振动仪的基础上改进了共振实验演示装置。装置由T形支架下的弹簧和小球组成振动系统,通过比较浸没在水中的小球的固有周期和转动圆盘出现最大振幅时的周期,进而得到二者频率的关系,即共振产生的条件.

To correct the errors in the resonance demonstrating experiment in the textbook of senior high school, the resonance demonstrating device, which is based on the forced vibration of spring vibrator in college physical experiment, is improved. The vibration system consists of a spring under a T shape plank and a small ball. Comparing the natural period of the small ball in water with the period of maximum amplitude on a rotating disk, the resonance condition is obtained.