球面摆铅直方向的运动由一非线性振动方程描述。
The motion of spherical pendulum in z direction is described by nonlinear oscillation equation.
讨论了球面摆的运动方程，分析了摆球运动的周期性。
The equation of motion for a spherical surface vibration is studied, and the period is analysed.
讨论了球面摆的运动方程，分析了摆球运动的周期性。
The equation of motion for a spherical surface vibration is studied, and the period is analysed.
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