Modal identification of structures from seismic response data via amplitude-dependent time series model

Wei Chih Su, Chiung-Shiann Huang, Ching Yu Liu

研究成果: Conference contribution同行評審

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.

原文English
主出版物標題Applied Science and Precision Engineering Innovation
頁面1155-1159
頁數5
DOIs
出版狀態Published - 1 一月 2014
事件International Applied Science and Precision Engineering Conference 2013, ASPEC 2013 - NanTou, Taiwan
持續時間: 18 十月 201322 十月 2013

出版系列

名字Applied Mechanics and Materials
479-480
ISSN(列印)1660-9336
ISSN(電子)1662-7482

Conference

ConferenceInternational Applied Science and Precision Engineering Conference 2013, ASPEC 2013
國家Taiwan
城市NanTou
期間18/10/1322/10/13

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