![]() ![]() The mechanical system vibrates at one or more of its natural frequencies and damps down to motionlessness.įorced vibration is when a time-varying disturbance (load, displacement, velocity, or acceleration) is applied to a mechanical system. ![]() Examples of this type of vibration are pulling a child back on a swing and letting it go, or hitting a tuning fork and letting it ring. Machining vibrations are common in the process of subtractive manufacturing.įree vibration occurs when a mechanical system is set in motion with an initial input and allowed to vibrate freely. Car suspension: Designing vibration control is undertaken as part of acoustic, automotive or mechanical engineering. One of the possible modes of vibration of a circular drum (see other modes). Hence, attempts to reduce noise are often related to issues of vibration. vocal cords) these pressure waves can also induce the vibration of structures (e.g. Sound, or pressure waves, are generated by vibrating structures (e.g. The studies of sound and vibration are closely related (both fall under acoustics). ![]() Careful designs usually minimize unwanted vibrations. Such vibrations could be caused by imbalances in the rotating parts, uneven friction, or the meshing of gear teeth. For example, the vibrational motions of engines, electric motors, or any mechanical device in operation are typically unwanted. In many cases, however, vibration is undesirable, wasting energy and creating unwanted sound. Vibration can be desirable: for example, the motion of a tuning fork, the reed in a woodwind instrument or harmonica, a mobile phone, or the cone of a loudspeaker. The oscillations may be periodic, such as the motion of a pendulum, or random, such as the movement of a tire on a gravel road. Vibration (from Latin vibrō 'to shake') is a mechanical phenomenon whereby oscillations occur about an equilibrium point. ![]()
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