FACTOID # 146: About one-quarter of all nations drive on the left-hand-side of the road. Most of them are former British colonies.
 
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Encyclopedia > Natural frequency

fdg--220.118.190.135 16:24, 28 August 2005 (UTC)--220.118.190.135 16:24, 28 August 2005 (UTC) Image:Example.jpg Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...


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BOSS Model (1851 words)
Resonance is a buildup of amplitude in a physical system that occurs when the frequency of an applied oscillatory force is close to the natural frequency of the system.
In the case of an earthquake, the ground shaking may be at the same frequency as the natural frequency of a building.
The taller the rod, the lower the natural frequency.
Natural Frequency (238 words)
A key aspect of structural dynamic analysis concerns the behavior of a structure at "resonance." The natural frequency of vibration of a structure --- whether a wood-frame house or a radio tower --- corresponds to that structure's resonant frequency.
It illustrates the effects of different frequencies of vibration on four different "structures." Each structure has the same mass at the top and the same size (diameter) rod supporting the mass.
Note that the displacement of the table associated with the hydraulic actuator frequency of motion is very small and is hardly noticeable.
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