<title>Damping matrix identification and experimental verification</title>

Identification of Damping: Part 1, Viscous Damping

“…Most of the methods assume from the outset that the system is viscously damped (see the review paper by Pilkey and Inman [20]) and then formulate the theory to identify a viscous damping matrix. Here, it is intended to investigate how much can be learnt by "tting a viscous damping model when the actual system is non-viscously damped, as must be expected to be the case for most practical systems.…”

Evaluation of Damping Non-Proportionality Using Identified Modal Information

“…In a similar way, M can be used to evaluate the index de"ned by equation (10). Because M is a complex matrix, the maximum and minimum eigenvalues and are evaluated using " " which is formed from the absolute values of elements in M .…”

“…Many studies on damping matrix identi"cation have been reported. A survey of the studies in this area is given in [7]. It has been shown that it is not feasible to completely identify the modal damping matrix when only the complex modes and eigenvalues are available.…”

Computational prediction of low impact shock propagation in a lab-scale space bolted frame structure

“…Studying the natural frequencies, modal behavior, and damping of a structure, which constitute its dynamic characterization, can yield a better understanding of the dynamics of the structure and its reliability [13]. The frequency response function (FRF), which is obtained from fast Fourier transform (FFT), is the common method for determining the natural frequencies and mode shapes of a structure [14]. However, a simpler procedure is to determine the natural frequencies of a structure directly from the FFT; the frequencies corresponding to the conspicuous peaks in the FFT signal are the natural frequencies of the structure [15].…”