Wavelet-based damage detection of multi-degree of-freedom structures

被引：0

作者：

Hashimoto, Yuito ^{[1
]}

Masuda, Arata ^{[1
]}

Sone, Akira ^{[1
]}

Iba, Daisuke ^{[1
]}

机构：

[1] Mechanical and System Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto-shi, Kyoto

来源：

Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C | 2006年 / 72卷 / 11期

关键词：

Damage detection; Multi-degree-of-freedam structures; Propagation of discontinuities; Sampling frequency; Wavelet transform;

D O I：

10.1299/kikaic.72.3517

中图分类号：

学科分类号：

摘要：

In this paper, a method is proposed to identify the time and the location of the damage from responses of multi-degree-of-freedom (MDOF) structure based on the wavelet transform, which has the capacity to detect singularities. First, propagation of discontinuities in the response is investigated qualitatively in order to explain how the structural responses are influenced by sudden changes in structural parameters. Next, the influence of changes of stiffness to the response is quantified. And a method is proposed to connect the wavelet transform to the location of the damage by the state space representation of the MDOF structures. Finally, a simple experiment is carried out to show that the proposed methods are valid in the laboratory-scale structural model reinforced by additional stiffness members. Results of the experiment are showed that the proposed method can identify the existence of small changes in stiffness, but the damage identification is influenced by the way of selections of a sampling frequency and a central frequency of a wavelet.

引用

页码：3517 / 3524

页数：7

共 5 条

[1]

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[2]

Sone A., Et al., Health Monitoring System of Machines and Strucures by Wavelet Transform (Genration of Orthnormal Bases of Wavelets and Detection of Abnormal Signals Generated at Random Intervals), Transactions of the Japan Society of Mechanical Engineers, Series C, 61, 586, pp. 166-172, (1995)

[3]

Al-Khalidy A., Et al., A Study of Health Monitoring Systems of Linear Structures Using Wavelet Analysis, Proceeding of the ASME PV&P Conference, 347, pp. 49-58, (1997)

[4]

Hou Z., Et al., Damage Detection Using Wavelet Approach and Its Applocation for On-line Health Monitoring, Proceeding of The Second World Conference on Structural Control, 3, pp. 2351-2358, (1998)

[5]

Masuda A., Et al., Wavelet-Based Health Monitoring of Randomly Excited Structures, Proceedings of the 15th ASCE Engineering Mechanics Conference, 208, pp. 1-8, (2002)

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