TY - JOUR
T1 - Damping identification using perturbation techniques and higher-order spectra
AU - Fung, J.
AU - Hajj, M. R.
AU - Nayfeh, A. H.
AU - Fahey, S. O.F.
PY - 1998
Y1 - 1998
N2 - Perturbation techniques and spectral moments are combined to characterize and quantify the damping and nonlinear parameters of the first mode of a three-beam two-mass frame. The frame is excited harmonically near twice its lowest natural frequency. The response is modeled with a second-order nonlinear equation with quadratic and cubic terms and linear and quadratic damping terms. The method of multiple scales is used to obtain a second-order approximate solution for this model. Bispectral analysis is used to quantify the level of coupling between modes and measure their phase difference. The amplitudes and phase difference of modes with different frequencies are substituted into the approximate solution to determine the damping and nonlinear parameters.
AB - Perturbation techniques and spectral moments are combined to characterize and quantify the damping and nonlinear parameters of the first mode of a three-beam two-mass frame. The frame is excited harmonically near twice its lowest natural frequency. The response is modeled with a second-order nonlinear equation with quadratic and cubic terms and linear and quadratic damping terms. The method of multiple scales is used to obtain a second-order approximate solution for this model. Bispectral analysis is used to quantify the level of coupling between modes and measure their phase difference. The amplitudes and phase difference of modes with different frequencies are substituted into the approximate solution to determine the damping and nonlinear parameters.
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M3 - Conference article
AN - SCOPUS:0031697866
SN - 1046-6770
VL - 2
SP - 1447
EP - 1453
JO - Proceedings of the International Modal Analysis Conference - IMAC
JF - Proceedings of the International Modal Analysis Conference - IMAC
T2 - Proceedings of the 1998 16th International Modal Analysis Conference, IMAC. Part 1 (of 2)
Y2 - 2 February 1998 through 5 February 1998
ER -