In order to solve structural multi-damage detection problem,a damage localization method based on cloud algorithm and modal strain energy index is presented.First,structural modal strain energy is considered as identification parameter and an improved modal strain energy dissipation ration index(IMSEDRI)is presented to identify structural damage locations.Then,cloud algorithm is introduced and a backward cloud generator is proposed to process the noisy modal data.The simulation results demonstrate that the calculated results of the proposed index are better than those of the basic modal strain energy dissipation ration index,and the method based on cloud algorithm and IMSEDRI can analyze damage problem with random noise interference.
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