Spectral element modeling based structure piezoelectric impedance computation and damage identification

Abstract

This paper presents a numerical simulation study on electromechanical impedance technique for structural damage identification. The basic principle of impedance based damage detection is structural impedance will vary with the occurrence and development of structural damage, which can be measured from electromechanical admittance curves acquired from PZT patches. Therefore, structure damage can be identified from the electromechanical admittance measurements. In this study, a model based method that can identify both location and severity of structural damage through the minimization of the deviations between structural impedance curves and numerically computed response is developed. The numerical model is set up using the spectral element method, which is promised to be of high numerical efficiency and computational accuracy in the high frequency range. An optimization procedure is then formulated to estimate the property change of structural elements from the electric admittance measurement of PZT patches. A case study on a pin-pin bar is conducted to investigate the feasibility of the proposed method. The results show that the presented method can accurately identify bar damage location and severity even when the measurements are polluted by 5% noise.

Keywords

PZT / piezoelectric impedance / optimization / spectral element / damage identification

References

[1] Hera A, Hou Z. Application of wavelet approach for ASCE structural health monitoring benchmark studies. Journal of Engineering Mechanics, 2004, 130(1): 96-104

[2] Park G, Sohn H, Farrar C R, Inman D J. Overview of piezoelectric impedance-based health monitoring and path forward. Shock and Vibration Digest, 2003, 35(6): 451-463

[3] Tseng K K H, Naidu A S K. Non-parametric damage detection and characterization using smart piezoceramic material. Smart Materials and Structures, 2002, 11(3): 317-329

[4] Liang C, Sun F P, Rogers C A. Coupled electro-mechanical analysis of adaptive material systems—determination of the actuator power consumption and system energy transfer. Journal of Intelligent Material Systems and Structures, 1994, 5(1): 12-20

[5] Giurgiutiu V, Zagrai A. Electro-mechanical impedance method for crack detection in metallic plates. Proceedings of the Society for Photo-Instrumentation Engineers, 2001, 4335: 131-142

[6] Giurgiutiu V, Redmond J M, Roach D P, Rackow K. Active sensors for health monitoring of aging aerospace structures. Proceedings of the Society for Photo-Instrumentation Engineers, 2000, 3985: 294-305

[7] Giurgiutiu V, Zagrai A N. Embedded self-sensing piezoelectric active sensors for on-line structural identification. Journal of Vibration and Acoustics, 2002, 124(1): 116-125

[8] Tseng K K, Wang L. Impedance-based method for nondestructive damage identification. Journal of Engineering Mechanics, 2005, 131(1): 58-64

[9] Doyle J F. Wave Propagation in Structures: Spectral Analysis Using Fast Discrete Fourier transforms. 2nd ed. New York: Springer-Verlag, 1997

[10] Lee U, Kim J, Leung A Y. The spectral element method in structural dynamics. Shock and Vibration Digest, 2000, 32(6): 451-465

[11] Ritdumrongkul S, Fujino Y. Identification of the location and level of damage in multiple-bolted-joint structures by PZT actuator-sensors. Journal of Structural Engineering, 2006, 132(2): 304-311

[12] Peairs D M, Inman D J, Park G. Circuit analysis of impedance-based health monitoring of beams using spectral elements. Structural Health Monitoring, 2007, 6(1): 81-94

[13] Wang X, Tang J. Damage identification using piezoelectric impedance approach and spectral element method. Journal of Intelligent Material Systems and Structures, 2009, 20(8): 907-921

Acknowledgments

This research was supported by the Rising-star Program of Shanghai Commission of the Science and Technology (No. 09QH1402300), and the Independent Research Program of State Key Laboratory for Disaster Reduction in Civil Engineering (SLDRCE09-B-15).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg