Mechanical resonance

[gsalih]

In a mechanical system of say 5 elements of different stiffness and masses are mechanically assembled together.
One of the 5 elements start to resonate by an external force.
The amplitude of the vibration is measured in each of the elements during resonance. Each element shows different amplitude of vibration at resonance frequency.
The task is to determine which element is actually resonating.
Is the element with the highest amplitude of vibration is the one that is resonating?

 

[GregLocock]

No. It's actually a pretty interesting question, and if you oversimplify things you may end up in a muddle. On the other hand anyone who has performed a real life modal analysis will probably jump to the right conclusion.

Is there damping in the coupling elements or is the system undamped?

Are you sure the preceding chapter in the textbook didn't give any clues?

Cheers

Greg Locock


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