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dc.contributor.authorREBILLAT, Marc
dc.contributor.authorHAJRYA, Rafik
dc.contributor.author
 hal.structure.identifier
MECHBAL, Nazih
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
dc.date.accessioned2013
dc.date.available2013
dc.date.issued2013
dc.date.submitted2013
dc.identifier.urihttp://hdl.handle.net/10985/7399
dc.description.abstractStructural damages can result in nonlinear dynamical responses. Thus, estimating the nonlinearities generated by damages potentially allows detecting them. In this paper, an original approach called the ES2D (Exponential Sine Sweep Damage Detection) is proposed for nonlinear damage detection. This approach is based on a damage index that reflects the ratio of the energy contained in the nonlinear part of the output versus the energy contained in its linear part. For this, we suppose that the system under study can be modeled as a cascade of Hammerstein models, made of N branches in parallel composed of an elevation to the nth power followed by a linear filter called the nth order kernel. The Exponential Sine Sweep Method (ESSM) is then used to identify the linear and nonlinear parts of the model. Exponential sine sweeps are a class of sine sweeps that allow estimating a system’s first kernels in a wide frequency band from only one measurement. The ES2D method is illustrated experimentally on two actual composite plates with surface-mounted PZT-elements: one healthy and one damaged (impact). A given propagation path between a sensor and an actuator in the system is here under investigation. Using the ESSM, the first kernels modeling this propagation path are estimated for both the damaged and undamaged states. On the basis of these estimated first Kernels, the damage index is built. Its detecting efficiency and its insensitivity to environmental noise are then assessed.
dc.language.isoen_US
dc.publisherDEStech Publications, Inc.
dc.rightsPost-print
dc.subjectStructural health monitoring
dc.subjectnon-linear system identi cation
dc.subjectdamage detection
dc.titleDetection of structural damage using the exponential sine sweep method
dc.typdocCommunication avec acte
dc.localisationCentre de Paris
dc.subject.halSciences de l'ingénieur: Acoustique
dc.subject.halSciences de l'ingénieur: Mécanique: Matériaux et structures en mécanique
dc.subject.halSciences de l'ingénieur: Traitement du signal et de l'image
ensam.audienceInternationale
ensam.conference.titleInternational Workshop on Structural Health Monitoring
ensam.conference.date2013-09-10
ensam.countryUnited States
ensam.title.proceedingInternational workshop on Structural Health Monitoring 2013
ensam.page1226-1234
hal.identifierhal-00874641
hal.version1
hal.submission.permittedupdateMetadata
hal.statusaccept


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