Impedance-Based Method for Nondestructive Damage Identification
Publication: Journal of Engineering Mechanics
Volume 131, Issue 1
Abstract
A structural damage identification technique based on the impedance method is presented in this paper using smart piezoelectric transducer (PZT) patches. A modeling framework is developed to determine the structural impedance response and the dynamic output forces of PZT patches from the electric admittance measurements. A damage identification scheme for solving the nonlinear optimization problem is proposed to locate and quantify the structural damage through the minimization of the discrepancy between the structural impedance response and the numerically computed frequency response. The proposed technique does not use modal analysis or model reduction, and only the electric admittance measurements of PZT patches and the analytical system matrices are required. A beam example has been employed to illustrate the effectiveness of the proposed algorithm numerically. Furthermore, the influence of the measurement noise on the results has been investigated.
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Acknowledgments
This research is supported, in part, by Grant No. 0215831 from the National Science Foundation and by Grant No. NAG8-01914 from the National Aeronautics and Space Administration.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 131 • Issue 1 • January 2005
Pages: 58 - 64
Copyright
© 2004 ASCE.
History
Received: Oct 14, 2002
Accepted: Feb 25, 2004
Published online: Jan 1, 2005
Published in print: Jan 2005
Notes
Note. Associate Editor: Eric N. Landis
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