The present paper offers structural damage detection methods based on the relative changes in localized flexibility properties. The localized flexibility matrices are obtained either by applying a decomposition procedure to an experimentally determined global flexibility matrix or by processing the output signals of a vibration test in a substructure-by-substructure manner. Three methods are evaluated in the present paper: a free-free substructural flexibility method, a deformation-based flexibility method, and a strain-basis flexibility method. These methods are applied to a model ten-story building problem, an experimental bridge damage data, and a hybrid experimental-simulated engine structure. The present methods are found to correctly identify damage locations.
Get full access to this article
View all access options for this article.
References
1.
Alvin, K. F. (1997),"Finite Element Model Update via Baysian Estimation and Minimization of Dynamic Residuals,"AIAA Journal, 35(5):879-886.
2.
Alvin, K. F. and Park, K. C. (1996), "A Partitioned System Identification Procedure for Substructural Flexibility Determination,"Proc. 1996 AIAA Adaptive Structures Forum, Paper No. AIAA-96-1297, Salt Lake City, UT.
3.
Alvin, K. F. , Peterson, L. D., and Park, K. C. (1997), "Extraction of Normal Modes and Full Modal Damping from Complex Modal Parameters,"AIAA Journal, 35(7):1187-1194.
4.
Doebling, S. W. et al. (1996), "Damage Identification and Health Monitoring of Structural and Mechanical Systems from Changes in Their Vibration Characteristics: A Literature Survey,"Los Alamos National Laboratory, Report No. LA-12767-MS, Los Alamos, NM.
5.
Doebling, S. W. , Peterson, L. D. and Alvin, K. F. (1996), "Estimation of Reciprocal Residual Flexibility from Experimental Modal Data,"AIAA Journal, 34(8):1678-1685.
6.
Farhat, C. and Hemez, F. (1993), "Updating Finite Element Dynamic Models Using an Element-by-Element Sensitivity Methodology,"AIAA Journal, 31(9):1702-1711.
7.
Farrar, C. R. et al. (1994), "Dynamic Characterization and Damage Detection in the I-40 Bridge over the Rio Grande,"Los Alamos National Laboratory, Report No. LA-13070-MS, Los Alamos, NM.
8.
James, III, G. H. (1996), "Development of Structural Health Monitoring Techniques Using Dynamics Testing," Report No. SAND96-0810.UC-706, Sandia National Laboratories, Albuquerque, NM.
9.
Kaouk, M. and Zimmerman, D. C. (1995a), "Structural Health Assessment Using a Partition Model Update Technique,"Proc. 13th International Modal Analysis Conference, 1673-1679.
10.
Kaouk, M. and Zimmerman, D. C. (1995b), "Reducing the Required Number of Modes for Structural Damage Assessment,"Proc. 1995 AIAA SDM Conference, Paper No. AIAA 95-1094, New Orleans, LA.
11.
Park, K. C. (1997), "A Theory for Strain Output-Based Structural System Identification,"Center for Aerospace Structures, Report No. CU-CAS-97-02, University of Colorado, Boulder, CO.
12.
Park, K. C. and Alvin, K. F. (1996), "A Partitioned System Identification Procedure for Substructural Flexibility Determination,"Proc. 1996 AIAA Adaptive Structures Forum, Paper No. AIAA 96-1297, Salt Lake City, UT; submitted to AIAA Journal.
13.
Park, K. C. and Felippa, C. A. (1998), "A Variational Framework for Solution Method Developments in Structural Mechanics,"Journal of Applied Mechanics, Vol. 65(1):242-249.
14.
Park, K. C. and Reich, G. W. (1997), "Localized System Identification and Structural Health Monitoring from Vibration Test Data,"Proc. 1997 AIAA SDM Conference, Paper No. AIAA 97-1318, Kissimmee, FL.
15.
Redhorse, J. R. and Alvin, K. F. (1996), "Finite Element Modeling, Reconciliation, and Evaluation of Predictive Accuracy: A Case Study,"Proc. 1996 AIAA/ASME Adaptive Structures Forum, Paper No. AIAA 96-1296, Salt Lake City, UT.
16.
Robertson, A. N. , Park, K. C. and Alvin, K. F. (1998), "Extraction of Impulse Response Data via Wavelet Transform for Structural System Identification,"ASMEJournal of Vibrations and Acoustics, 120(l):252-260.
17.
Robertson, A. N. , Park, K. C. and Alvin, K. R. (1998), "Identification of Structural Dynamics Models Using Wavelet-Generated Impulse Response Data,"ASME Journal of Vibrations and Acoustics, 120(1):261-266.
18.
Robertson, A. N. and Park, K. C. (1997), "Filtering of Vibration Records and Markov Parameters via Wavelet and Fourier Methods,"Proc. 1997 AIAA SDM Conference, Paper No. AIAA 97-1213, Kissimmee, FL.
