In this paper, we present a study of dimensional reduction techniques for structural damage assessment of time-varying structures under uncertainty. Discrete tracking of the frequency response and the mode shape curvature index method is employed to perform damage assessment. Assessment of spontaneous damage in deteriorating structures is important as it can have potential benefits in improving their safety and performance. Most of the available damage assessment techniques incorporate the usage of system identification and classification techniques for detecting damage, location, and/or severity; however, much work is needed in the area of dimensional reduction in order to compress the ever-increasing data and facilitate decision-making in damage assessment classification. A comparison of dimensional reduction techniques is presented and evaluated in terms of separating damaged from undamaged data sets under two types of uncertainty, structural deterioration and environmental uncertainties. The use of a recursive principal component analysis for detecting and tracking structural deterioration and spontaneous damage is evaluated via computational simulations. The results of this study reveal that dimensional reduction techniques can greatly enhance structural damage assessment under uncertainties. This paper compares multiple dimensional reduction techniques by identifying their weaknesses and strengths.
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December 2011
Research Papers
Effects of Dimensional Reduction Techniques on Structural Damage Assessment Under Uncertainty
Israel Lopez,
Israel Lopez
Mechanical and Aerospace Engineering, University of California
, Davis, Davis, CA 95616
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Nesrin Sarigul-Klijn
e-mail: nsarigulklijn@ucdavis.edu
Nesrin Sarigul-Klijn
Mechanical and Aerospace Engineering, University of California
, Davis, Davis, CA 95616
Search for other works by this author on:
Israel Lopez
Mechanical and Aerospace Engineering, University of California
, Davis, Davis, CA 95616
Nesrin Sarigul-Klijn
Mechanical and Aerospace Engineering, University of California
, Davis, Davis, CA 95616e-mail: nsarigulklijn@ucdavis.edu
J. Vib. Acoust. Dec 2011, 133(6): 061008 (12 pages)
Published Online: October 18, 2011
Article history
Received:
December 20, 2008
Revised:
October 24, 2010
Online:
October 18, 2011
Published:
October 18, 2011
Citation
Lopez, I., and Sarigul-Klijn, N. (October 18, 2011). "Effects of Dimensional Reduction Techniques on Structural Damage Assessment Under Uncertainty." ASME. J. Vib. Acoust. December 2011; 133(6): 061008. https://doi.org/10.1115/1.4003592
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