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Author: tracylam
Time: 10/04/07 02:56 PST
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"Splitting" of natural frequency

 Hi

I am studying on a 3 DOF system and I can calculate its three natural frequencies and they match quite well with the experimental result. However, I found a phenomenon that there is “splitting” of the natural frequency (I assume there should be 3 sharp peaks on my frequency response curve but 4 peaks appeared). I wonder what the origin of the additional “natural frequency” is. Would you mind giving me some suggestions?

Thanks a lot.

Regards,

Tracy

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