標題: Identifying the modal parameters of structure from Seismic Response in time-frequency domain
作者: Su, W. C.
Huang, C. S.
Liu, C. Y.
土木工程學系
Department of Civil Engineering
公開日期: 1-Jan-2015
摘要: This work presents the use of a short time Fourier transform to determine the natural frequencies, damping ratios, and mode shapes of a structure from its free vibration or earthquake response 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 length of frequency band and noise on the ability to accurately estimate the dynamic characteristics are also investigated. The feasibility of the present procedure to elucidate real structures is demonstrated through processing the measured responses of steel frames in shaking table tests.
URI: http://hdl.handle.net/11536/146374
期刊: LIFE-CYCLE OF STRUCTURAL SYSTEMS: DESIGN, ASSESSMENT, MAINTENANCE AND MANAGEMENT
起始頁: 2151
結束頁: 2157
Appears in Collections:Conferences Paper