Fault detection methods using direct stiffness matrix correction formulations for use with laser data

Jose Roberto de F. Arruda; Carlson Antonio Mendes Vercosa

doi:10.1117/12.185307

8 September 1994 Fault detection methods using direct stiffness matrix correction formulations for use with laser data

Jose Roberto de F. Arruda, Carlson Antonio Mendes Vercosa

Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185307
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy

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.

Citation Download Citation

Jose Roberto de F. Arruda and Carlson Antonio Mendes Vercosa "Fault detection methods using direct stiffness matrix correction formulations for use with laser data", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185307

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