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dc.contributor.authorSu, Wei-Chihen_US
dc.contributor.authorHuang, Chiung-Shiannen_US
dc.date.accessioned2018-08-21T05:53:11Z-
dc.date.available2018-08-21T05:53:11Z-
dc.date.issued2017-02-01en_US
dc.identifier.issn1392-8716en_US
dc.identifier.urihttp://dx.doi.org/10.21595/jve.2016.17894en_US
dc.identifier.urihttp://hdl.handle.net/11536/144364-
dc.description.abstractA structure under damage normally exhibits nonlinear dynamic behaviors and time-dependent stiffness and damping. By estimating instantaneous dynamic characteristics of a structures is generally very useful when assessing structural damage in real application. This study presents a novel and effective approach that accurately estimating instantaneous dynamic characteristic of a structure using time-varying autoregressive exogenous (TVARX) model on Gabor frame. To evaluate the time-varying coefficient matrices of a time-series model, the proposed procedure applies Gaussian-based weighted function and Fourier transform on time series model, then the Gabor-transform-based time series formula could be obtained. The dynamic characteristics of a structure are determined from the coefficient matrices. Numerical analyses demonstrate that the proposed approach is superior to traditional time-frequency analysis in accurately estimating instantaneous dynamic characteristics of a structure. Finally, the proposed approach is applied to process measured data for a steel frame specimen subjected to a series of base excitations in shaking table tests.en_US
dc.language.isoen_USen_US
dc.subjecttime varyingen_US
dc.subjectGabor transformen_US
dc.subjectinstantaneous dynamic characteristicsen_US
dc.titleA study on Gabor frame for estimating instantaneous dynamic characteristics of structuresen_US
dc.typeArticleen_US
dc.identifier.doi10.21595/jve.2016.17894en_US
dc.identifier.journalJOURNAL OF VIBROENGINEERINGen_US
dc.citation.volume19en_US
dc.citation.spage447en_US
dc.citation.epage457en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000395864100036en_US
Appears in Collections:Articles