FE Model Updating for Health Monitoring of Structures and its Experimental Verification by Damage Detection

Abstract:

Article Preview

This paper presents an effective method of FE model updating for health monitoring of structures by applying ambient vibration. And this method is experimented through damage detection and proved to be valid. Experiment about ambient vibration is performed on cantilever beam, and the dynamic characteristics are analyzed by NExT and ERA. The results of such experiments are compared to those of FE analysis, and this comparison enables us to overcome some errors in experiments and analysis. On the basis of improved results by the comparison, model updating is performed in order to construct a basic structure for health monitoring. For model updating, we employ direct matrix updating method (DMUM) and Error matrix method (EMM) in which ambient vibration is easily applied. The model updating by the methods are again evaluated in terms of error ratio of natural frequency, comparing each result before and after updating. Finally, we perform experiments on damage detection to verify the method of updating presented here, and evaluate its performance by eigen-parameter change method. The evaluation proves that the method of FE model updating using ambient vibration is effective for health monitoring of structure, and some further application of this method is suggested.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

268-272

DOI:

10.4028/www.scientific.net/KEM.321-323.268

Citation:

G. H. Heo et al., "FE Model Updating for Health Monitoring of Structures and its Experimental Verification by Damage Detection", Key Engineering Materials, Vols. 321-323, pp. 268-272, 2006

Online since:

October 2006

Export:

Price:

$35.00

[1] Doebling, S.W., Farrar, C.R., Prome, M.B. and Shevitz, D.W.: Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: a literature review ( Los Alamos National Laboratory Report LA-13070-MS, 1996).

[2] Johnson, E.A., Lam H.F., Katafygiotis, L.S., Beck, J.L.: A Benchmark Problem for Structural Health Monitoring and Damage Detection ( Proc. 14th Engineering Mechanics Conf, 2000).

[3] Baruch, M.: Optimization Procedure to Correct Stiffness and Flexibility Matrices Using Vibration Tests ( AIAA J., 16(11), pp.1208-1210, 1978).

[4] Berman, A. and Nagy, E.J.: Improvement of a Large Analytical Model Using Test Data (AIAA J., 21(8), pp.1168-1173, 1983).

[5] Sidhu, J. and Ewins, D.J.: Correlation of Finite Element and Modal Test Studies of a Practical Structure ( Proc. 2nd Intl. Modal Anal. Conf., pp.756-762, 1984).

[6] Salawu O. S. and Williams C.: Structural Damage Detection Using Experimental Modal Analysis-A Comparison of Some Methods ( Proc. 11th Intl. Modal Anal. Conf., 1993).

[7] Lieven, N.A.J. and Ewins, D.J.: Spatial Correlation of Mode Shapes, the Coordinate Modal Assurance Criterion(COMAC) ( Proc. 6th Intl. Modal Anal. Conf., pp.690-695, 1988).

In order to see related information, you need to Login.