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Unformatted text preview: m+n 4. The m+n defines a peak that, in the undamped oscillation, q or Q, is congruent with m . The square bracket terms, Q(m) and Q(m+n) are equal. Then a ratio of any two distinct peaks is This requires the measurement of amplitudes, integer cycles apart. As shown below, the ratio of amplitude measurements gives the damping ratio. 5. For small damping , the natural frequency term out-weighs the damping term (now the m symbol here is mass and n is for the natural frequency subscript) Then the key to calculating damping are 1. the calculation of critical damping from mass and natural frequency or 2. the computation of amplitude reduction from oscillation peaks. You can find peaks using the MATLAB code and the mouse selection method....
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This note was uploaded on 02/07/2011 for the course AE/ME 301 taught by Professor Lafleur during the Spring '11 term at Clarkson University .
- Spring '11