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

by You, Yuan Cheng , Deng, Yue Cheng , Sun, Hong Chun

in Cracks / Curvature / Damage / Flaw detection / Nondestructive testing / Position (location) / Rods / Structural steels

2012

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Journal Article

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

You, Yuan Cheng,

Deng, Yue Cheng,

Sun, Hong Chun

2012

Overview

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.

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Publisher

Trans Tech Publications Ltd

Subject

Cracks

/ Curvature

/ Damage

/ Flaw detection

/ Nondestructive testing

/ Position (location)

/ Rods