期刊
MEASUREMENT
卷 178, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2021.109393
关键词
Multi-damage localization; Full-field vibration measurements; Robust principal component analysis; Adaptive denoising; Data fusion
资金
- Fundamental Research Funds for the Central Universities [3102019HTQD011]
- Natural Science Basic Research Plan in Shaanxi Province of China [2020JQ-109]
- National Natural Science Foundation of China [51905388]
A novel robust multidamage localization method is proposed based on adaptive denoising and data fusion, which significantly enhances the accuracy of multi-damage localization by optimizing the process of damage feature extraction and data fusion.
Structural damage localization by using full-field vibration measurements is inevitably contaminated by measurement noise and not robust for multi-damage cases. To overcome these problems, a novel robust multidamage localization method is proposed based on adaptive denoising and data fusion. The major contributions are in three aspects. Firstly, an evaluator of multi-damage localization performance is proposed, which converts the damage localization into an optimization problem. Secondly, a hierarchical clustering is adopted to evaluate the damage zones by examining spatial characteristics of the damage. Thirdly, a data fusion strategy is developed based on the assessment of damage localization performance, which guarantees providing robust multi-damage localization results. In addition, numerical and experimental studies of multi-damaged plates are conducted to validate the feasibility and effectiveness of the proposed method. It is found that the accuracy of the multi-damage localization is significantly enhanced by optimizing the process of damage feature extraction and data fusion.
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