Development of residual operational deflection shape for crack detection in structures

被引：34
|
作者：
Asnaashari, Erfan [1 ]
Sinha, Jyoti K. [1 ]
机构：
[1] Univ Manchester, Sch Mech Aerosp & Civil Engn, Manchester M13 9PL, Lancs, England
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2014年 / 43卷 / 1-2期
关键词：
Crack detection; Crack breathing; Modal analysis; Operational deflection shape; DAMAGE DETECTION; FATIGUE CRACKS; BEAMS; BEHAVIOR;
D O I：
10.1016/j.ymssp.2013.10.003
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Excitation of a cracked structure at a frequency always generates higher harmonic components of the exciting frequency due to the breathing of the crack. In this paper, the deflection of cracked structures at the exciting frequency and the second harmonic component is mapped by a new method based on the operational deflection shape (ODS) for the purpose of crack detection. While the ODS is helpful in understanding dynamic behaviour of structures and machines, it is not always possible to determine the location of cracks in structures or machines based on the ODS itself. Therefore, a new concept called residual ODS (R-ODS) has been defined for crack detection in beam-like structures. This paper presents the details of the proposed method and its results when applied to numerical and experimental examples. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：113 / 123
页数：11
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