The Detection of Multi-hole Damages in Structures Based on Genetic Algorithms and Topology Optimization

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (7) : 201-204.

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The Detection of Multi-hole Damages in Structures Based on Genetic Algorithms and Topology Optimization

Li xiao-ping ; Zheng shi-jie

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Abstract

In view of the respective advantages of the genetic and topology optimization in structural damages identification , a new method of multiple damages identification in two-dimensional structure is established by combining genetic algorithm, finite element method and topology optimization. The objective function and constraint equations of topology optimization are linked with the fitness function of GA; the design variables of topology optimization and parameters of genetic algorithm were unified; and while the constraint equations of topology optimization were set as a condition to control the whole genetic computing loop. Instead of using continuous variables topology optimization, binary-coded genetic algorithm is used in multi-damage identification of two-dimensional structure with the hole damages to avoid the possible negative impaction which is brought by the threshold parameter determination in using continuous variables topology optimization. The results of two models simulation examples show that this method is feasible in two-dimensional structure damages detection, the good agreements with the actual situation can also obtained which is difficult to get by using continuous variable topology optimization method.

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multi-damage detection / genetic algorithms / topology optimization / parameter thresholds

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Li xiao-ping;Zheng shi-jie. The Detection of Multi-hole Damages in Structures Based on Genetic Algorithms and Topology Optimization[J]. Journal of Vibration and Shock, 2011, 30(7): 201-204