A Structural Damage Detection Method Based on Correlation Function From Vibration Measurements

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 221-224,.

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A Structural Damage Detection Method Based on Correlation Function From Vibration Measurements

Jia-yan Lei1,2; Qian-feng Yao1; Ying Lei2; Chao Liu2

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Abstract

A structural damage identification technique based on correlation function analysis of vibration measurements is proposed. An 8-storey steel shear building model has been chosen as the case verification. The results demonstrate that accident change of correlation function amplitudes can be used to locate the damage by comparing the shape changes of damaged and undamaged samples. The value of is effective to determinate that whether the damage has happened or not, and it can be used as a reference method even for structural health monitoring on-line. The parameter K, defined to detect damage degree, corresponds to the theoretical damage level in different cases.

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damage identification / correlation function / stochastic vibration / vibration test

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Jia-yan Lei; Qian-feng Yao; Ying Lei; Chao Liu. A Structural Damage Detection Method Based on Correlation Function From Vibration Measurements[J]. Journal of Vibration and Shock, 2011, 30(8): 221-224,