![]() ![]() The periodic input can be a harmonic or a non-harmonic disturbance.Įxamples of these types of vibration include a washing machine shaking due to an imbalance, transportation vibration caused by an engine or uneven road, or the vibration of a building during an earthquake.įor linear systems, the frequency of the steady-state vibration response resulting from the application of a periodic, harmonic input is equal to the frequency of the applied force or motion, with the response magnitude being dependent on the actual mechanical system. The mechanical system vibrates at one or more of its natural frequencies and damps down to motionlessness. Hence, attempts to reduce noise are often related to issues of vibration.Įxamples 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. Sound, or pressure waves, are generated by vibrating structures (e.g. Such vibrations could be caused by imbalances in the rotating parts, uneven friction, or the meshing of gear teeth. ![]()
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