高中物理机械振动这一章主要讲述机械振动中最简单、最基本的一种周期性运动———简谐运动。振动的知识在现实生活中有很多的应用(如心电图、核磁共振仪、地震仪、钟摆),振动的有关知识也是后面学习波动的基础,所以应重视这一节。这一章开始介绍了简谐运动的基本特点,然后通过 High school physical and mechanical vibrations This chapter mainly describes the simplest and most basic periodical motion in mechanical vibrations - simple harmonic motion. The knowledge of vibration has many applications in the real life (such as electrocardiogram, nuclear magnetic resonance apparatus, seismograph, pendulum), and the relevant knowledge of vibration is also the basis for learning the fluctuation later, so we should pay attention to this section. This chapter begins to introduce the basic characteristics of the Harmonic Movement and then