Structural oscillation modes identification by applying controlled loads and using microwave interferometry

Radar interferometry, capable of remote detection of displacements and deformations of a structure, has been successfully experimented in a number of case studies. Radar interferometry offers high-speed range imaging and range displacement measurement capability, but it lacks in the identification o...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2009-12, Vol.42 (8), p.748-752
Main Authors: Fratini, Matteo, Parrini, Filippo, Pieraccini, Massimiliano, Borri, Claudio, Atzeni, Carlo
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Dynamic monitoring
Exact sciences and technology
Materials science
Materials testing
Physics
Radar interferometry
Remote sensing
Structural test
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Summary:Radar interferometry, capable of remote detection of displacements and deformations of a structure, has been successfully experimented in a number of case studies. Radar interferometry offers high-speed range imaging and range displacement measurement capability, but it lacks in the identification of the different kinds of modes usually excited in a dynamic test. In this paper an approach to the measurement capable of identifying bending and torsional oscillation modes is described. The basic idea rely on the application of suitable loads to the structure under test in order to cause controlled changes of its frequency response. The results of such a dynamic test, performed on a canopy, are reported.
ISSN:0963-8695
1879-1174
DOI:10.1016/j.ndteint.2009.07.002