A PIEZOELECTRIC TRANSDUCER ARRAY-BASED METHOD FOR DAMAGE DETECTION IN PLATE STRUCTURES

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (9) : 56-59.

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A PIEZOELECTRIC TRANSDUCER ARRAY-BASED METHOD FOR DAMAGE DETECTION IN PLATE STRUCTURES

PENG haikuo MENG Guang LI Fucai

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Abstract

Based on phased array, a method using a transmitter and a cross-shape piezoelectric (PZT) transducer array was proposed for the purpose of damage detection in plate structures. Lamb wave propagation in an aluminum plate with and without a crack was simulated using spectral finite element method. The response signals of the structure were taken in the location of the elements of the PZT array and the difference signals of those responses were calculated. The time shifting is carried out according to the scheme and the relative locations of elements in the PZT array and then the signals are summed to detect damages in structure. The damaged plate structure was investigated using a cross-shape array. The results demonstrate that the proposed method can effectively detect the damages in plate structures.

Key words

Structural health monitoring / Lamb wave / Damage detection / Phased array

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PENG haikuo MENG Guang LI Fucai. A PIEZOELECTRIC TRANSDUCER ARRAY-BASED METHOD FOR DAMAGE DETECTION IN PLATE STRUCTURES[J]. Journal of Vibration and Shock, 2009, 28(9): 56-59