Browsing by Author "Di Wang, Shing"

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Applying Time-Frequency Analysis on Earthquake Inputs and Structure Responses
(2014-01-01)
Huang, Chiung Shisnn
;
Su, Wei Chih
;
Chen, Liane Jye
;
Di Wang, Shing
;
土木工程學系
This work presents the use of a short time Fourier transform to identify the modal parameters (such as natural frequencies, damping ratios and mode shapes) of a structure from its earthquake responses data. The short time Fourier transform is applied to the measured acceleration responses of a structural system, and to reconstruct the autoregressive with exogenous input (ARX) model in time-frequency domain. The accuracy of this procedure is numerically confirmed; the effects of the remove frequency band and noise on the ability to accurately estimate the dynamic characteristics are also investigated.