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Measuring natural frequency

Hi guys

I'm doing this project of harvesting electricity from vibrations using piezo ceramics... and for this i need the input vibrations to be as close to the natural frequency of my device as possible.

The mechanical part of the device is a piezo ceramic fibre with an attached steel shim, held rigid on one end by a clamp and a mass on the free end; a cantilever beam with a mass at the free end basically.

How can i measure the natural frequency of the device knowing all the specifications??

Any input might help..😕
Thanks

Replies

  • silenthorde
    silenthorde
    Im no mechanical engineer.

    But natural freq is sqrt(k/M)

    According to you M should be known.

    Measure K by applying a Force and measuring the resulting displacement.

    If the displacement and the force is known accurately enough, the natural frequency can be determined accurately.

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