Transactions of Nanjing University of Aeronautics & Astronautics
TwoDimensional Modal Curvature for Damage Detection in Plates
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Abstract:
Mode shape has become a hotspot of vibrationbased damage detection in plates. Twodimensional(2D) modal curvature (MC2D), derived from mode shapes, is a prevailing physical quantity used to indicate damage. Unfortunately, the physical mechanism of MC2D for characterizing damage in plates has not been clarified to date. In contrast, onedimensional(1D) modal curvature (MC1D) has explicit physical mechanism to portray damage in beams. Unresolved physical mechanism of MC2D severely hampers its applications for damage identification in plates. To address this deficiency, the clarification mechanism of MC2D is investigated to identify damage. With the clarified mechanism, numerical and experimental cases are used to demonstrate the effectiveness of MC 2D in detecting damage in plates.
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Project Supported:
the National Natural Science Foundation of China(50675102, 50975137, 51375231); the Program for New Century Excellent Talents in University (NCET-10-068); the Research the Key Program of the National Natural Science Foundation of China (No.11132003), the Qing Lan Project, and the Fundamental Research Funds for the entral Universities (Nos. 012B05814, 2014B03914).
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