简谐运动是一种最简单最基本的振动 ,其动力学特点是回复力具有Ｆ =-ｋｘ的形式 ,其运动学特点是具有周期性 ,周期Ｔ =2π ｍｋ ,其中ｍ是振动体质量 ,ｋ是回复力与位移成正比的比例系数 .应用周期公式 ,结合对物理过程的分析 ,我们可以解决很多有关振动问题 ,特别是一些貌似与 Harmonic motion is the simplest and most basic vibration. Its dynamic characteristic is that the restoring force has the form of F =-kx. Its kinematics are periodic, and the period T = 2π mk, where m is the mass of the vibrating body. k is a proportional coefficient proportional to the restoring force and displacement. Applying the periodic formula, combined with the analysis of the physical process, we can solve many problems related to vibration, especially some seemingly