Publication
Title
Structural intensity analysis of flat plates based on digital stroboscopic holography measurements
Author
Abstract
The analysis of structural intensity vector fields has shown to be a practical approach to characterize the energy flow in plate-like structures and to localize regions of injected or absorbed power. Such an analysis is performed by differentiating measured velocity or displacement fields of a sample. The quality of such a study strongly depends on the spatial resolution of the deformation data and its signal-to-noise ratio. The digital stroboscopic holography concept is presented in this work and used as a tool to record such deformations on a flat plate, which is in direct contact with a shaker and a damper. The current set-up could provide the recording of displacement fields at a high spatial resolution showing little corruption by noise. These conditions permitted the measurement of deformation patterns containing short wavelengths, which were later used as inputs for the structural intensity analysis. By calculating the spatial derivatives of several out-of-plane displacement fields, the energy flowing through the plate was estimated and the position of the external devices (shaker and damper) could be identified by locating regions of the energy dispersion or convergence. The location of these specific regions was made even clearer by calculating the divergence of the energy flow. (C) 2018 Elsevier Ltd. All rights reserved.
Language
English
Source (journal)
Journal of sound and vibration / University of Southampton. Institute of Sound and Vibration Research. - London
Publication
London : 2018
ISSN
0022-460X
Volume/pages
428 (2018) , p. 168-178
ISI
000434693800011
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Understanding functioning and evolution of bird middle ear mechanics through high-realism finite element modelling and system identification.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 10.07.2018
Last edited 17.09.2021
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