Study on the Method of Crack Detection of Steel Rods Based on Modal Analysis

Abstract:

Steel rods are widely used in the areas of petroleum, chemical, architecture and transportation, steel rods with cracks will cause terrible accident and great losses when working in production practice. In view of traditional Non-destructive Testing (NDT) method can only realize static detection, this paper provide the method based on modal calculate analysis, including the choice of damage index and the judgment of damage degree and damage location for cracks of steel rods. The damage location is judged by the strain mode shape difference curve and the function expression of damage degrees and mutation degrees of curvature mode shapes is acquired by the method of least square fitting, which can achieve quantitative analysis of single crack of steel rods, this provide theoretical support and technical reference for experimental modal analysis and dynamic NDT.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.3
• Online since: December 2012
• Authors: Hong Chun Sun, Yue Cheng Deng, Yuan Cheng You
• Keywords: Curvature Mode Shapes, Damage, Index, Steel Rods, Strain Mode Shapes

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