標題: . Modal Identification Of Structures From Seismic Response Data Via Amplitude-Dependent Time Series Model
作者: Su, Wei Chih
Huang, Chiung Shiann
Liu, Ching-Yu
交大名義發表
National Chiao Tung University
關鍵字: amplitude-dependent ARX;instantaneous modal parameters;moving least-squares
公開日期: 2014
摘要: The present work develops a novel procedure of establishing an amplitude-dependent time series model for a nonlinear system and estimating the instantaneous modal parameters of the system from the dynamical responses. The undetermined coefficient in an amplitude-dependent autoregressive with exogenous input (amplitude-dependent ARX) model are assumed as functions of amplitude and are expanded by shape functions constructing by moving least-squares with polynomial basis functions. The amplitude of dynamical responses could be obtained by Hilbert transform. The instantaneous modal parameters of the system are directly estimated from the coefficient in the amplitude-dependent ARX model. Finally, the proposed approach is applied to process measured data for a frame specimen subjected to a series of base excitations in shaking table tests. The specimen was damaged during testing. The identified modal parameters are consistent with observed physical phenomena.
URI: http://dx.doi.org/10.4028/www.scientific.net/AMM.479-480.1155
http://hdl.handle.net/11536/135275
ISBN: 978-3-03785-947-6
ISSN: 1660-9336
DOI: 10.4028/www.scientific.net/AMM.479-480.1155
期刊: APPLIED SCIENCE AND PRECISION ENGINEERING INNOVATION, PTS 1 AND 2
Volume: 479-480
起始頁: 1155
結束頁: +
Appears in Collections:Conferences Paper