Damage Detection of Steel Beam Using Frequency Response Function Measurement Data and Fractal Dimension

被引:11
作者
Lee, Eun-Taik [1 ]
Eun, Hee-Chang [2 ]
机构
[1] Chung Ang Univ, Dept Architectural Engn, Seoul 200701, South Korea
[2] Kangwon Natl Univ, Dept Architectural Engn, Chunchon 156756, Gangwon Do, South Korea
来源
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 2015年 / 137卷 / 03期
基金
新加坡国家研究基金会;
关键词
IDENTIFICATION;
D O I
10.1115/1.4029687
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Fractal-dimension-based signal processing has been extensively applied to various fields for nondestructive testing. The dynamic response signal can be utilized as an analytical tool to evaluate the structural health state without baseline data. The fractal features of the dynamic responses with fractal dimensions (FDs) were investigated using the Higuchi, Katz, and Sevcik methods. The waveform FD proposed by these methods was extracted from the measured frequency response function (FRF) data in the frequency domain. Damage was observed within this region, which resulted in an abrupt change in the curvature of the FD. The effectiveness of the methods was investigated via the results of a steel beam test and a numerical experiment to detect damage.
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页数:5
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