A hybrid multiple damages detection method for plate structures  

作　　者：JIANG YongYing XIANG JiaWei LI Bing CHEN XueFeng LIN LiQu 

机构地区：[1]School of Mechanical Engineering, Xi'an Jiaotong University [2]School of Mechanical Engineering, Wenzhou University

出　　处：《Science China(Technological Sciences)》2017年第5期726-736,共11页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51475356);the National Key Basic Research Program of China(Grant No.2015CB057400);the Wenzhou Technologies R&D Program of China(Grant No.G20140047)

摘　　要：A hybrid method is proposed to properly identify multiple damages for plate structures in this work. In the stage of damage localization, singular value decomposition （SVD） is applied to reveal singularities in modal shapes, and hence to detect the damage locations. In the stage of damage quantification, based on the detected location information ant colony optimization （ACO） algorithm is introduced to estimate damage severity by searching for damage evaluation database, which reveals the relationship between the natural frequencies and the damage severity. The modal shapes and the natural frequencies required in damage localization and quantification are obtained via the wavelet finite element method. The numerical simulation and experimental investigation are carried out to test the performance of the hybrid method for free aluminum plates with multiple damages. And the results indicate that the proposed method is effective to identify multiple damages of plate structures with reasonable precision.

关 键 词：PLATE singular value decomposition （SVD） ant colony optimization （ACO） damage detection hybrid method 

分 类 号：TG115.28[金属学及工艺—物理冶金]