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《Journal of Dynamics and Control》 2005-03
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Li Jiankang Zhang Chunli Xie Xinxin (Faculty of Science,Jiangsu University,Zhenjiang 212013,China)  
Because the curvature mode used in dynamic detection is sensitive to the damaged location of the dynamic structure,the traditional method mainly used the central difference method to solve the curvature mode and its accuracy depends on the density of the measurement grid in dynamic detection,the central differ- ence method will induce a very large error in dynamic damage detection.Taking advantage of the good approxi- mation of the Chebyshev polynomial,we defined a Chebyshev polynomial function of the mode shape,and ob- tained the corresponding curvature mode by the second derivatives of the Chebyshev polynomial function of the mode shape.The method provided a reliable data for dynamic damage detection and achieved a good effect.
【CateGory Index】: TH113.1
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