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Unformatted text preview: 25), we can measure the static response of the beam to an applied load. For the purposes of measuring the frequency response , one can model the vibration of a cantilevered beam as a second order system. A damped second order system response can be characterised by two parameters, the undamped natural frequency, ω , and the damping ratio, ζ (eq. 3). By measuring the frequency and amplitude decay in free vibration, both parameters can be estimated by experiment. 2 BUT . ...... enquiring minds might want to know: Why? What does the damping ratio correspond to, physically? Why should the damping be proportional to the velocity? Why is it like viscous damping? Think....
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 Spring '08
 Spedding
 Second moment of area, applied moment, EBH, simple cantilevered beam, Gage Location

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