Acoustic energy transfer by friction induced vibrations

Lacerra, Giovanna; Massi, Francesco; Chatelet, Eric; Moulin, Emmanuel

Type de document :

Communication dans un congrès avec actes

Titre :

Acoustic energy transfer by friction induced vibrations

Auteur(s) :

Lacerra, Giovanna [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Dipartimento di Ingegneria Meccanica e Aerospaziale [Roma La Sapienza] [DIMA]
Massi, Francesco [Auteur]
Dipartimento di Ingegneria Meccanica e Aerospaziale [Roma La Sapienza] [DIMA]
Chatelet, Eric [Auteur]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Moulin, Emmanuel [Auteur]

Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 [IEMN-DOAE]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Titre de la manifestation scientifique :

X International Conference on Structural Dynamics, EURODYN 2017

Ville :

Rome

Pays :

Italie

Date de début de la manifestation scientifique :

2017-09-10

Éditeur :

1356-1361

Discipline(s) HAL :

Sciences de l'ingénieur [physics]
Informatique [cs]
Physique [physics]

Résumé en anglais : [en]

Friction-induced vibrations are often investigated for their unwanted effects, such as surface wear and dynamic instabilities. This article focuses on the exploitation of friction-induced vibrations to transfer the energy ...
Lire la suite >Friction-induced vibrations are often investigated for their unwanted effects, such as surface wear and dynamic instabilities. This article focuses on the exploitation of friction-induced vibrations to transfer the energy between different acoustic fields by an interface under frictional contact. One of the main possible applications is the use of the generated acoustic field for passive structural health monitoring (SHM). A mechanical device (secondary acoustic source, SAS), able to perform the energy transfer,is here tested on a simplified benchmark. The energy transfer is obtained between two vibrational fields: a primary field, which isthe ambient acoustic field on the structure and is generated by a known source, and a secondary field with a different frequencycontent produced with the developed device by friction-induced vibrations. The test bench analyzed in this work is composed by amain structure, which is excited by the primary (ambient) acoustic field, and the SAS, able to absorb part of the acoustic energy of the primary field and radiate it within the secondary acoustic field. The device is composed by a main resonator, excited by theprimary acoustic field, in frictional contact with a secondary resonator to provide a broadband secondary acoustic field. Theobjective of the article is to analyze and estimate the power flows from the main structure to the SAS and vice versa, within thetwo acoustic fields.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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