The applicability of Gabor wavelet transform of time history data in detecting a thin damage in beam is examined. For the case where the damage position is completely unknown, the use of two load positions is suggested. Cases considered are the position of the sensors relative to the damage and load positions, the height of the damage, the severity of the damage, and the effect of boundary conditions. The results show that the method is suitable for detecting localized damage and relatively robust in terms of sensor position, damage height, and degree of damage.
Issue Section:
Brief Notes
1.
Surace, C., and Ruotolo, R., 1994, “Crack Detection of a Beam Using the Wavelet Transform,” Proceedings of the 12th International Modal Analysis Conference, Honolulu, pp. 1141–1147.
2.
Wang
, Q.
, and Deng
, X.
, 1999
, “Damage Detection With Spatial Wavelets
,” Int. J. Solids Struct.
, 36
, pp. 3443
–3468
.3.
Kishimoto
, K.
, Inoue
, H.
, Hamada
, M.
, and Shibuya
, T.
, 1995
, “Time Frequency Analysis of Dispersive Waves by Means of Wavelet Transform
,” ASME J. Appl. Mech.
, 62
, pp. 841
–846
.4.
Graff, K. F., 1975, Wave Motion in Elastic Solids, Oxford University Press, London.
Copyright © 2001
by ASME
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