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A New Method of Acoustical Remote Evaluation of Defective Structures and Material Characterization
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
Responsible organisation
2007 (English)Conference paper, (Refereed)
Abstract [en]

The feasibility of a remote monitoring of structures for a progressive damage assessment as well as material characterization using a simple and inexpensive experimental setup is discussed. The method is based on a remote acoustic excitation of transverse vibrations on a membrane using an ordinary broadband low frequency loudspeaker, and the measurement of the response using a Laser Doppler Vibrometer (LDV). Theoretical modeling is also developed to correlate the experimental results obtained, and this yields a new method for Non Destructive Testing (NDT) of sheet-like materials. The function generator provides an input voltage of a sine signal to the loudspeaker, and laser detection of the surface vibrational response of the sample is accomplished with the laser vibrometer.

Place, publisher, year, edition, pages
Canadian Acoustical Association , 2007.
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:bth-8342Local ID: oai:bth.se:forskinfoD170127A5C077E27C1257505005663EAOAI: oai:DiVA.org:bth-8342DiVA: diva2:836052
Conference
2007 CAA Annual Conference
Available from: 2012-09-18 Created: 2008-11-18 Last updated: 2017-03-17Bibliographically approved

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