Natural frequency often refers to the frequency at which a structure “wants” to oscillate after an impact or displacement.
For example, when you strike a tuning fork, it rings and then the sound eventually diminishes. An object can vibrate in two ways: free vibration and forced vibration.įree vibration occurs when an object or structure is displaced or impacted and then allowed to oscillate naturally. Vibration can be expressed in metric units (m/s 2) or units of gravitational constant g, where 1 g = 9.81 m/s 2. It can be periodic, such as the motion of a pendulum, or random, such as the movement of a tire on a gravel road. Vibration is the movement or mechanical oscillation about an equilibrium position of a machine or component.
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