Detection of Structural Damage Through Changes in Frequency

Among all the structural vibration characteristics, natural frequencies are relatively simple and accurate to measure, and provide the structural global damage informalion. In this paper, the feasibility of using only natural frequencies to identify structural damage is exploited by adopting two usu...

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Bibliographic Details
Published in:Wuhan University journal of natural sciences 2005-11, Vol.10 (6), p.1069-1073
Main Authors: Hong-ping, Zhu, Bo, He, Xiao-qiang, Chen
Format: Article
Language:English
Subjects:
Damage detection
Damage localization
Laboratory tests
Neural networks
Resonant frequencies
Robustness (mathematics)
Sensitivity analysis
Structural damage
Structural vibration
Vibration measurement
人工网络
损伤检测
灵敏度分析
频率变换
鲁棒性
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Summary:Among all the structural vibration characteristics, natural frequencies are relatively simple and accurate to measure, and provide the structural global damage informalion. In this paper, the feasibility of using only natural frequencies to identify structural damage is exploited by adopting two usual approaches, namely, sensitivity analysis and neural networks. S, ome aspects of damage detection such as the problem of incomplete modal test data and robustness of detection are considered. A laboratory tested 3 storey frame is used to demonstrate the possibility of frequency-based damage detection techniques. The numerical results show that the damaged element can be correctly localized and the content of damage can be identified with relatively high degree of accuracy by using the changes in frequencies.
ISSN:1007-1202
1993-4998
DOI:10.1007/bf02832469