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《Journal of Naval Aeronautical and Astronautical University》 2009-03
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Research on the Damage Identification Based on Rotational Mode Shape Curvature

WANG Cheng-qiang1,CHEN Huai-hai1,JIANG Shuang-yan1,FAN Xiang-dang2 (1.College OfAerospace Engineering,Nanjing University ofAeronautics and Astronautics,Nanjing 210016,China; 2. Qingdao Branch of NAAU,Qingdao Shandong 26604 1,China)  
The mode shape curvatures were obtained by the central difference method after the mode data was measured in frequency domain.The modal parameters were calculated of a cantilever beam before or after damages occur at different positions by FEM numerical simulation.The given evaluation index was used to identify the damage in the beam.A detection method using the curvature of rotational mode displacement was set forth.The simulating results showed that the damage identification accuracy was better than the used method by translation modes.
【CateGory Index】: TU317
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