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《Journal of Vibration and Shock》 2007-01
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COMPLEX DAMAGE DETECTION METHOD BASED ON CMSE AND NICHEGA

Ge Xu,Yan Yunju,Chen huanguo(School of Mechanics and Civil Eng & Architecture,Department of Mechanics,Northwestern Polytechnical University,Xi'an 710072)  
An effective method for complex damage detection using the improved Cross Modal Strain Energy(CMSE) technique and Niche Genetic algorithms is presented.The traditional modal strain energy method is not convenient for structural damage detection because it needs to compare the modal information of the same mode between the baseline and damaged structures,and also requires the analytical and measrued modes to be consistent in scale,or to be normalized.However,no such a constraint is required for the CMSE method.In addition,combination of CMSE and the Niche Genetic Algorithms method proposed here well enhances the capacity of identifying structural damage localization.Numerical studies of complex damage detection for a model of composite material airfoil case are given and the obtained results show that the method proposed is successful for complex damage detection of large structures.
【Fund】： 国家自然科学基金资助项目503075123
【CateGory Index】： TP274.4
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