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Resonance is an exact frequency match between the disturbing frequency and the isolator natural frequency. They are "in-tune" with each other. This produces a perfect "in-phase" frequency relationship that causes maximum amplification of transmitted vibration. Obviously this condition must be avoided. However, it cannot be avoided entirely, since an isolated unit will pass through resonance as it "runs-up-to" and "coasts-down-from" its normal running speed. If the unit "runs-up-to" and "down-from" speed quickly, the machine's inertia acts to minimize amplification. However, if the unit passes slowly through resonance, damping must be provided.
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Last Updated ( Tuesday, 27 September 2005 )
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