Space Rigid Frame Damage Identification Method Based on Modal Analysis

Abstract:

Space frame structure of no damage and injury finite element models were established with ANSYS, and analyze 3D curvature mode as well three-dimensional vibration mode variety rate of the space rigid frame based on modal analysis. Curvature mode and three-dimensional vibration mode variety rate as the labeled amount was selected and applied to structural damage. The calculated results showed that the first-order curvature mode not only identify against single or multiple damage location, but also determine the initial degree of injury, and the axial curvature mode is better than the horizontal curvature mode for damage identification; The calculated results also showed that the variety rate of the first-order vibration mode can identify against damage location. Methods were provided by identifying the space frame structural damage of the curvature mode or three-dimensional vibration mode variety rate.

• Periodical: Applied Mechanics and Materials (Volumes 351-352)
• Pages: 1244-1248
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.351-352.1244
• Online since: August 2013
• Authors: Hong Yu Jia, Peng Fei Yue, Xiao Fei Wang
• Keywords: Damage Identification, Modal Analysis, Space Rigid Frame, Structural Damage

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