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简谐振动的振动图象和一维简谐横波的波动图象,从形状上看是相同的,都是正弦曲线或余弦曲线,故有些同学常把振动图象与波形图象混淆起来,其实二者有本质的区别,下面分几点加以介绍: 一、振动图象和波动图象的区别 1.物理含义:振动图象表达的是一个振动质点的位移随时间变化的曲线,是一个质点在一段时间内位移连续变化的情况,但不是振动轨迹;波动图象表达的是在某一时刻沿波的传播方向上介质的各个质点的位移,是一系列连续质点在同一时刻的情况,是波的形状.
The vibration image of harmonic vibration and the fluctuation image of one-dimensional harmonic shear wave are the same in shape, both of which are sinusoidal or cosine curve. Therefore, some students often confuse the vibration image with the waveform image, in fact There are essential differences between the two, the following points to be introduced: First, the difference between the vibration image and the image of the wave 1. Physical meaning: the vibration image is expressed as a vibration particle displacement curve over time is a particle The displacement continuously changes over a period of time, but not the vibrational track. The fluctuating image expresses the displacement of each particle of the medium along the wave propagation direction at a certain moment, which is the case when a series of continuous particles are at the same time Wave shape.