TY - JOUR
T1 - Crack detection in existing structures using noise-contaminated dynamic responses
AU - Haldar, A.
AU - Martinez-Flores, R.
AU - Katkhuda, H.
N1 - Funding Information:
This paper is based on work partly supported by University of Arizona Foundation under a small grant program. Any opinions, findings, conclusions, or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsor.
PY - 2008/8
Y1 - 2008/8
N2 - Crack detection is existing structures using measured dynamic response information is presented in this paper. The general area of health assessment of existing structures in the presence of uncertainty in modeling the structure, characteristics of sensors, and the dynamic response information collected by the sensors is emphasized. A time domain system identification-based procedure is proposed to assess health of a structure at the finite element level in the presence of all major sources of uncertainty. It is denoted as the GILS-EKF-UI method. The method does not require information on excitation that caused the response and the noise-contaminated response information needs not be available at all dynamic degrees of freedom. The method is verified using computer generated analytical and actual measured response information emphasizing three items: (1) identification of the defect-free frame, (2) detection of location of a crack accurately within a defective element, and (3) detection of a crack using limited response information using the GILS-EKF-UI method.
AB - Crack detection is existing structures using measured dynamic response information is presented in this paper. The general area of health assessment of existing structures in the presence of uncertainty in modeling the structure, characteristics of sensors, and the dynamic response information collected by the sensors is emphasized. A time domain system identification-based procedure is proposed to assess health of a structure at the finite element level in the presence of all major sources of uncertainty. It is denoted as the GILS-EKF-UI method. The method does not require information on excitation that caused the response and the noise-contaminated response information needs not be available at all dynamic degrees of freedom. The method is verified using computer generated analytical and actual measured response information emphasizing three items: (1) identification of the defect-free frame, (2) detection of location of a crack accurately within a defective element, and (3) detection of a crack using limited response information using the GILS-EKF-UI method.
KW - Crack detection
KW - Experimental verifications
KW - Finite element
KW - Health assessment of structures
KW - Kalman filter
KW - System identification
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U2 - 10.1016/j.tafmec.2008.04.007
DO - 10.1016/j.tafmec.2008.04.007
M3 - Article
AN - SCOPUS:47149102895
SN - 0167-8442
VL - 50
SP - 74
EP - 80
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
IS - 1
ER -