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一、振动的起因 机械振动是工程中常见的现象,其存在形式也是多种多样的。最简单的,如时钟挂摆的摆动,悬挂在弹簧上质块的颤动,比较复杂的,如机器运转时机体表面的跳动,车辆运行时车身的(扌晃)动,等等。种类繁多的机械振动,它们的运动规律千差万别,很难做出完整、确切的定义。然而可以这样认为,所谓机械振动(或振动)是运动物体的运动量(用位移、速度及加速度来描述)大小相对其平均值或者基准值,从小到大与从大到小在时间上做重复交替的变化。
First, the causes of vibration Mechanical vibration is a common phenomenon in engineering, its existence is also a variety of forms. The easiest, such as swinging the clock pendulum, flutter hanging on the spring mass, is more complicated, such as the body surface beating when the machine is running, the body moving when the vehicle is running, and so on. A wide range of mechanical vibrations, their movement patterns vary widely, it is difficult to make a complete and precise definition. However, it can be said that the mechanical vibration (or vibration) is the amount of movement of moving objects (described by displacement, velocity and acceleration) relative to the average value or the reference value, from small to large and from large to small in time to repeat The change.