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HomeKey Engineering MaterialsKey Engineering Materials Vols. 326-328Experimental Verification of the Structural Damage...

Experimental Verification of the Structural Damage Identification Method Developed for Beam Structures

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Abstract:

In this paper, an experimental verification has been conducted for a frequency response function (FRF)-based structural damage identification method (SDIM) proposed in the previous study [1]. The FRF-based SDIM requires the natural frequencies and mode shapes measured in the intact state and the FRF-data measured in the damaged state. Experiments are conducted for the cantilevered beam specimens with one and three slots. It is shown that the proposed FRF-based SDIM provides damage identification results that agree quite well with true damage state.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

1113-1116

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.1113

Citation:

Cite this paper

Online since:

December 2006

Authors:

Deokki Youn, Usik Lee, Oh Yang Kwon

Keywords:

Beam, Damage Identification, FRF, Structural Damage, Vibration

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Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

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[1] U. Lee and J. Shin: Computers & Structures Vol. 80 (2002), pp.117-132.

[2] R.D. Adams, P. Cawley, C.J. Pye, B.J. Stone: J. Mech. Eng. Science Vol. 20 (1978), pp.93-100.

[3] P. Cornwell, S.W. Doebling, C.R. Farrar: J. Sound and Vibration Vol. 224 (1999), pp.359-374.

[4] J.S. Lew: AIAA Journal Vol. 33 (1995), pp.2189-2193.

[5] A.K. Pandey and M. Biswas: Int. J. Analy. Exper. Modal Analysis Vol. 10 (1995), pp.104-117.

[6] J.M. Ricles and J.B. Kosmatka: AIAA Journal Vol. 30 (1992), pp.2310-2316.

[7] P. Cawley: Journal of NDT International Vol. 17 (1984), pp.59-65.

[8] S.K. Thyagarajan, M.J. Schulz, P.F. Pai: J. Sound and Vibration Vol. 210 (1998), pp.162-170.

[9] H.T. Banks, D.J. Inman, D.J. Leo and Y. Wang: J. Sound and Vibration Vol. 191 (1996), p.859880.

1 4 3.

2 2 9.

5 4 2.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4 9 elements : DIE = 1. 20 ×××× 10-1 27 elements : DIE = 5. 32 ×××× 10-2 81 elements : DIE = 2. 86 ×××× 10-4 (a) Specimen A: One Damage.

1 0 0.

1 9 1.

0 3 9.

2 5 8.

4 1 9.

2 0 4.

3 4 9.

6 5 9.

2 5 2.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4 9 elements : DIE = 1. 68 ×××× 10-1 27 elements : DIE = 4. 09 ×××× 10-2 81 elements : DIE = 4. 02 ×××× 10-2 (b) Specimen B: Three Damages.

1 5 6.

2 0 9.

4 2 3.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4 9 elements : DIE = 1. 15 ×××× 10-1 27 elements : DIE = 5. 65 ×××× 10-2 81 elements : DIE = 1. 67 ×××× 10-2 (a) Specimen A: One Damage.

1 0 1.

1 7 5.

0 4 6.

1 5 0.

2 6 0.

1 2 4.

3 0 9.

4 6 7.

2 4 7.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4.

0 0 . 1 0 . 2 0 . 3 0 . 4 9 elements : DIE = 1. 70 ×××× 10-1 27 elements : DIE = 7. 51 ×××× 10-2 81 elements : DIE = 1. 96 ×××× 10-2 (b) Specimen B: Three Damages.