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Non-contact nonlinear acoustic damage localization in plates. Part 2: Localized resonance through dynamically trapped modes
Ansvarlig organisasjon
2008 (engelsk)Inngår i: Acta Acustica united with Acustica , ISSN 1610-1928 , Vol. 94, nr 1, s. 48-53Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This work is the second part of three that presents new tools to be used for damage localization in plates by nonlinear acoustical methods. It introduces an important in-plane localization technique, which is based on the existence of resonant spatially localized wave fields. The wave from the transducer is acting as a dynamic influence on the plate surface, making the waves reflect in a non-ideal way. The non-ideal reflections make the modes underneath the transducer have different resonant frequencies than the modes beside the insonified area. They appear both for contact and non-contact sources. In the nonlinear damage localization application, the trapped mode wave field interacts with another signal at lower frequency. This results in sidebands around the high frequency whose amplitudes are related to the amount of damage underneath the transducer.

sted, utgiver, år, opplag, sider
S. Hirzel Verlag GmbH , 2008. Vol. 94, nr 1, s. 48-53
Emneord [en]
Dynamically trapped modes, Nonlinear acoustics, Damage detection
HSV kategori
Identifikatorer
URN: urn:nbn:se:bth-8612ISI: 000252983600007Lokal ID: oai:bth.se:forskinfoC290AE3C1E1B162AC125742C002C7E30OAI: oai:DiVA.org:bth-8612DiVA, id: diva2:836353
Tilgjengelig fra: 2012-09-18 Laget: 2008-04-15 Sist oppdatert: 2015-06-30bibliografisk kontrollert

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