Passive defect detection in plate from ...
Type de document :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes
DOI :
Titre :
Passive defect detection in plate from nonlinear conversion of low-frequency vibrational noise
Auteur(s) :
Moulin, Emmanuel [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Chehami, Lynda [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Assaad, Jamal [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
de Rosny, Julien [Auteur]
Institut Langevin - Ondes et Images (UMR7587) [IL]
Prada, Claire [Auteur]
Institut Langevin - Ondes et Images (UMR7587) [IL]
Chatelet, Eric [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Lacerra, Giovanna [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Gryllias, Konstantinos [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Massi, Francesco [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Chehami, Lynda [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Assaad, Jamal [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
de Rosny, Julien [Auteur]
Institut Langevin - Ondes et Images (UMR7587) [IL]
Prada, Claire [Auteur]
Institut Langevin - Ondes et Images (UMR7587) [IL]
Chatelet, Eric [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Lacerra, Giovanna [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Gryllias, Konstantinos [Auteur]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Massi, Francesco [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Titre de la manifestation scientifique :
172nd Meeting of the Acoustical Society of America, 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan
Ville :
Honolulu, Hawaii, USA
Pays :
Etats-Unis d'Amérique
Date de début de la manifestation scientifique :
2016-11-28
Date de publication :
2016-10
Mot(s)-clé(s) en anglais :
Ultrasound
Acoustic noise
Flexural waves
Acoustic signal processing
Friction
Acoustic noise
Flexural waves
Acoustic signal processing
Friction
Discipline(s) HAL :
Physique [physics]/Mécanique [physics]/Vibrations [physics.class-ph]
Résumé en anglais : [en]
It is known that, under the assumption of diffuse noise, the cross-correlation of acoustic signals recorded at two points of a medium allows to passively estimate the impulse response between these points. This principle, ...
Lire la suite >It is known that, under the assumption of diffuse noise, the cross-correlation of acoustic signals recorded at two points of a medium allows to passively estimate the impulse response between these points. This principle, associated with coherent array processing, has been successfully applied to defect detection and localization in reverberant plates subject either to distributed noise sources or friction noise. In order to extend the applicability of this principle even in the absence of an adequate ambient noise, we have introduced the concept of secondary noise sources based on the conversion of low-frequency modal vibrations into high-frequency noise by exploiting frictional contact nonlinearities. The device consists of a mass-spring resonator coupled to a flexible beam by a rough frictional interface. The extremity of the beam, attached to the surface of a plate, excites efficiently flexural waves in the plate in the ultrasound range when the primary resonator vibrates around its natural frequency. We have shown that a set of such devices distributed on a plate excited by a shaker at low frequencies is able to produce high-frequency noise suitable for passive defect detection and localization based on noise correlation.Lire moins >
Lire la suite >It is known that, under the assumption of diffuse noise, the cross-correlation of acoustic signals recorded at two points of a medium allows to passively estimate the impulse response between these points. This principle, associated with coherent array processing, has been successfully applied to defect detection and localization in reverberant plates subject either to distributed noise sources or friction noise. In order to extend the applicability of this principle even in the absence of an adequate ambient noise, we have introduced the concept of secondary noise sources based on the conversion of low-frequency modal vibrations into high-frequency noise by exploiting frictional contact nonlinearities. The device consists of a mass-spring resonator coupled to a flexible beam by a rough frictional interface. The extremity of the beam, attached to the surface of a plate, excites efficiently flexural waves in the plate in the ultrasound range when the primary resonator vibrates around its natural frequency. We have shown that a set of such devices distributed on a plate excited by a shaker at low frequencies is able to produce high-frequency noise suitable for passive defect detection and localization based on noise correlation.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Source :