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dc.contributor.author陈伟琪zh_CN
dc.date.accessioned2013-12-12T02:08:47Z
dc.date.available2013-12-12T02:08:47Z
dc.date.issued2007zh_CN
dc.identifier.citationSmart Materials & Structureszh_CN
dc.identifier.issn0964-1726zh_CN
dc.identifier.otherISI:000248674000054zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/60799
dc.description.abstractAs a qualitative health monitoring method, the electromechanical impedance technique ( EMI) has been widely studied. Due to the complexities of the damaged structures and the difficulties in high-frequency analysis, further information about the nature of damage cannot be obtained using EMI in its conventional non-model-based way. Thus, in this paper, a hybrid technology combining the EMI technique and reverberation matrix method (RMM) is proposed to quantitatively correlate damage in beam structures with high-frequency signatures for structural health monitoring. Timoshenko beam theory is employed to study the dynamics of beam-like structures bonded with multiple pairs of PZT patches. A piecewise, homogeneous beam model is introduced to approximate the nonhomogeneous beam in which inhomogeneity is introduced because damages of an originally uniform beam can be modeled by different cross-sectional properties. Here, only one-dimensional axial vibration of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches and the host beam. An analytical expression of impedance ( or admittance) related to the response of the coupled model of the PZT patch-bonding layer-host beam system is derived and then investigated by comparing with other theories. Finally, covariance, a kind of non-parametric damage index, is also employed to identify the damage severity, propagation and location.zh_CN
dc.language.isoen_USzh_CN
dc.subjectPIEZO-TRANSDUCERSzh_CN
dc.subjectWAVE-PROPAGATIONzh_CN
dc.subjectADMITTANCE SIGNATURESzh_CN
dc.subjectACTIVE SENSORSzh_CN
dc.subjectIDENTIFICATIONzh_CN
dc.subjectACTUATORzh_CN
dc.subjectVIBRATIONzh_CN
dc.subjectTRUSSESzh_CN
dc.subjectPLATESzh_CN
dc.titleAn electromechanical impedance approach for quantitative damage detection in Timoshenko beams with piezoelectric patcheszh_CN
dc.typeArticlezh_CN


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