Structural Engineering and Mechanics

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Structural damage identification based on modified Cuckoo Search algorithm

  • Xu, H.J. (Department of Applied Mechanics and Engineering, Sun Yat-sen University) ;
  • Liu, J.K. (Department of Applied Mechanics and Engineering, Sun Yat-sen University) ;
  • Lv, Z.R. (Department of Applied Mechanics and Engineering, Sun Yat-sen University)
  • Received : 2015.05.23
  • Accepted : 2016.02.19
  • Published : 2016.04.10
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Abstract

The Cuckoo search (CS) algorithm is a simple and efficient global optimization algorithm and it has been applied to figure out large range of real-world optimization problem. In this paper, a new formula is introduced to the discovering probability process to improve the convergence rate and the Tournament Selection Strategy is adopted to enhance global search ability of the certain algorithm. Then an approach for structural damage identification based on modified Cuckoo search (MCS) is presented. Meanwhile, we take frequency residual error and the modal assurance criterion (MAC) as indexes of damage detection in view of the crack damage, and the MCS algorithm is utilized to identifying the structural damage. A simply supported beam and a 31-bar truss are studied as numerical example to illustrate the correctness and efficiency of the propose method. Besides, a laboratory work is also conducted to further verification. Studies show that, the proposed method can judge the damage location and degree of structures more accurately than its counterpart even under measurement noise, which demonstrates the MCS algorithm has a higher damage diagnosis precision.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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