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Proceedings Paper

Fault detection methods using direct stiffness matrix correction formulations for use with laser data
Author(s): Jose Roberto de F. Arruda; Carlson Antonio Mendes Vercosa
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Paper Abstract

In this paper, direct stiffness correction methods (Berman-Baruch methods) are revisited for use as a tool for localizing structural faults based on spatially dense mode shapes obtained experimentally using laser Doppler velocimeters. Besides the standard Berman-Baruch formulation and a recently proposed iterative formulation which preserves sparsity, three other alternative formulations are proposed by the authors. The methods are evaluated using both numerically simulated and experimental data. The numerical example results (clamped-free beam) show that some of the formulations indicated clearly the fault location. With the experimental example (free-free beam), however, the fault localization wasn't so evident. The experimental modal test was done with conventional instrumentation. The authors expect that better results can be obtained using laser data.

Paper Details

Date Published: 8 September 1994
PDF: 8 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185307
Show Author Affiliations
Jose Roberto de F. Arruda, Univ. Estadual de Campinas (Brazil)
Carlson Antonio Mendes Vercosa, Univ. Federal de Pernambuco (Brazil)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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