物理实验中最引人的演示之一是韦伯福斯摆,在竖直方向上的弹簧振子既作上下振动,又耦合成绕竖直轴转动,交替转换,不息耦合,十分动人。调节振子的结构,使竖直振动频率等于水平转动频率,然后使振子振动,则振动能量逐渐从一种振动模式转移到另一种振动模式,纯振动变为纯转动,纯转 One of the most intriguing demonstrations in physics experiments is Weberforth pendulum. The vertical spring vibrators are both up and down and coupled to rotate around a vertical axis. The structure of the vibrator is adjusted so that the vertical vibration frequency is equal to the horizontal rotation frequency, and then the vibrator is vibrated, then the vibration energy is gradually transferred from one vibration mode to another vibration mode, and the pure vibration turns into pure rotation, and the pure rotation