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首页> 外文会议>Reliability and optimization of structural systems >Damage identification by Levy ant colony optimization
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Damage identification by Levy ant colony optimization

机译：通过Levy蚁群优化进行损伤识别

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This paper deals with the identification of incipient damage in structural elements by non-destructive test based on experimentally measured structural dynamical response. By application of the Hilbert transform to the recorded signal the so-called phase of the analytical signal is recovered and a proper functional is constructed in such a way that its global minimum gives a measure of the damage level, meant as stiffness reduction. Minimization is achieved by applying a modified Ant Colony Optimization (ACO) for continuous variables, inspired by the ants' foraging behavior. The modification consists in the application of a new perturbation operator, based on alpha stable Levy distribution. Numerical application to three degrees of freedom system is proposed to show the method and test the performance.
机译：本文基于实验测得的结构动力响应，通过无损检测来识别结构元件的初期损坏。通过对所记录的信号应用希尔伯特变换，可以恢复分析信号的所谓相位，并以适当的方式构造功能，使其整体最小值可以衡量损伤程度，即降低刚度。通过对蚂蚁的觅食行为进行启发，对连续变量应用改进的蚁群优化（ACO），可以实现最小化。修改包括基于alpha稳定的Levy分布，应用新的扰动算子。提出了在三自由度系统中的数值应用，以说明该方法并测试其性能。

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