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Author: deajohn5556
Time: 10/04/07 09:51 PST
This is a reply to message no. 19182 by tracylam
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"Splitting" of natural frequency

Analytically, there will be three nearly equal peaks for each mass, but all will differ in amplitude of response depending on each mass, spring stiffness, and damping.  The frequencies will split, in other words not necessarily be at the frequency of each indivdual mass if calculated as a single degree of freedom system.

 If you are seeing four distinct peaks experimentally, I suspect there is another degree of freedom in your setup. 

 

John

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