CF-5200 Frequently Asked Questions
Question number FAQ-0334
In a shock test, if the Y value (dB) of the transfer function is positive, can it be interpreted as amplification due to resonance?
The transfer function (frequency response function) is
Y-axis (dB) = 10Log (chB/chA) 2
This represents the ratio.
If chA and chB are the same acceleration data
0dB means the ratio is 1, and dB means that channel B > channel A, indicating amplification.
In the case of an impulse hammer and acceleration, it means the ratio of acceleration to force.
In both cases, the natural frequency (resonant frequency) is a point with a peak-like shape.
Last updated: 2006-01-16