Abstract:A novel detection approach using curvature index of modal flexibility curvature and its curvature damage diagnosis index is proposed in this paper. The proposed method is based on the unique character of temperature propagation and distribution in structure; the temperature disturbance can be eliminated by differentiating a second time for flexibility curvature. A physical interpretation is demonstrated for the proposed method based on cointegration theory. The validity and effectiveness of the proposed method are illustrated through a simple supported beam simulation, and a statistical averaging technique is utilized to improve the noise resistance of these damage indexes. Thus, the proposed method has the potential to be implemented in practical applications.
HUANG Jiang,LIANG Yabin,FENG Qian. Damage Identification Method Research under the Influence of Environmental Temperature Based on Structural Vibration Mode Flexibility Curvature[J]. jgg, 2016, 36(12): 1121-1125.