Damage identification of the benchmark frame based on an improved cuckoo search

HUANG Minshui,QIAN Chaoyue,CHENG Shaoxi,LU Hailin

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (22) : 158-163.

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PDF(2866 KB)
Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (22) : 158-163.

Damage identification of the benchmark frame based on an improved cuckoo search

  • HUANG Minshui,QIAN Chaoyue,CHENG Shaoxi,LU Hailin
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Abstract

There are many disadvantages when cuckoo search (CS) is adopted in engineering optimization, mainly the low convergence accuracy and slow convergence.So, the CS was improved in the aspects of discovery probability and steplength, which was then used in damage identification.In the improved cuckoo search (ICS) the adaptive discovery probability and adaptive step length were adopted.A 3D finite element model of the ASCE Benchmark frame model in the University of British Columbia was setup with the help of the Matlab and the experimental frequencies and vibration modes in six damage cases were extracted from the laboratory data.In the end, a damage identification objective function was established making use of the frequency factor and mode shape factor, and the damage identification was carried out based on CS and ICS.It is shown that the damage location and damage degree of the structure can be identified with better accuracy based on ICS.The results are of great theoretical significance and engineering value, and it can be applied in the damage identification and health monitoring in practical engineering.

Key words

Damage identification / Improved cuckoo search (ICS) / Adaptive discovery probability / Adaptive step size / Benchmark frame model

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HUANG Minshui,QIAN Chaoyue,CHENG Shaoxi,LU Hailin. Damage identification of the benchmark frame based on an improved cuckoo search[J]. Journal of Vibration and Shock, 2018, 37(22): 158-163

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