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Structural Engineering and Mechanics Volume 58, Number 1, April10 2016 , pages 163-179 DOI: https://doi.org/10.12989/sem.2016.58.1.163 |
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Structural damage identification based on modified Cuckoo Search algorithm |
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H.J. Xu, J.K. Liu and Z.R. Lv
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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. | ||
| Key Words | ||
| damage detection; Cuckoo search algorithm; modal assurance criteria; tournament selection strategy; discovering probability | ||
| Address | ||
| H.J. Xu, J.K. Liu and Z.R. Lv: Department of Applied Mechanics and Engineering, Sun Yat-sen University, Guangzhou, Guangdong, P.R. China | ||