The vibration of the nonlinear pendulum is studied by means of linearization and correction method, the curves of the period ratio and the relative error is plotted.
应用线化和校正方法，研究了单摆的非线性振动，作出了周期比和相对误差随摆角的变化曲线。
The forced vibration of pendulum is described by four-dimensional phase space and the fourth order autonomous ordinary differential equation.
本文用四维相空间和四阶自洽常微分方程描写了单摆的受迫振动。
In addition to watch though shock, but strong impact in the outside world is easy to make the pendulum shaft tip or gear shaft broken, can make the vibration of the walking speed needle.
另外手表虽防震，但在外界的冲击力较强时易使摆轴尖或轮系轴颈折断，亦可使快慢针震动影响走时。
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