Please see the following update: MDOF Frequency Response Function Natural Frequency & Damping Extraction including Modal Overlap. Post Link The half-power bandwidth method can be used to estimate the damping ratio and corresponding Q value from the frequency response function of a structure which has… Read more
Here is a Matlab GUI script which converts between various damping metrics: damping.zip The supported metric include: quality factor Q fraction of critical damping [zeta] loss factor [eta] 3 dB Bandwidth [delta omega] 3 dB Bandwidth [delta f] damping frequency [fd] decay constant [sigma] time… Read more
Piezoelectric shunt damping systems reduce structural vibration by shunting an attached piezoelectric transducer with an electrical impedance. Current impedance designs result in a coupled electrical resonance at the target modal frequencies. Piezoelectric transducers (PZTs), in conjunction with appropriate circuitry, can be used as a mechanical… Read more