| Optimal mother wavelet-based Lamb wave analyses and damage detection for composite structures |
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| 引用本文： | Li Fucai Meng Guang Ye Lin. Optimal mother wavelet-based Lamb wave analyses and damage detection for composite structures[J]. 仪器仪表学报, 2007, 28(10): 1729-1735 |
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| 作者姓名： | Li Fucai Meng Guang Ye Lin |
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| 作者单位： | [1]State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China [2]School of Aerospace, Mechanical ＆ Mechatronic Engineering, The University of Sydney, NSW 2006, Australia |
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| 基金项目： | 国家自然科学基金;国家自然科学基金青年学者 |
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| 摘 要： |
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| 关 键 词： | 拉姆波 损失探测 内传感器 信息熵 最优小波基 |
| 修稿时间： | 2007-07-01 |
Optimal mother wavelet-based Lamb wave analyses and damage detection for composite structures |
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| Li Fucai,Meng Guang,Ye Lin. Optimal mother wavelet-based Lamb wave analyses and damage detection for composite structures[J]. Chinese Journal of Scientific Instrument, 2007, 28(10): 1729-1735 |
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| Authors: | Li Fucai Meng Guang Ye Lin |
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| Abstract: | With the purpose of on-line structural health monitoring,a transducer network was embedded into composite structure to minimize the influence of surroundings.The intrinsic dispersion characteristic of Lamb wave makes the wavelet transform an effective signal processing method for guided waves.To get high precision in feature extraction,an information entropy-based optimal mother wavelet selection approach was proposed,which was used to choose the most appropriate basis function for particular Lamb wave analysis.By using the embedded sensor network and extracting time-of-flight,delamination in the composite laminate was identified and located.The results demonstrate the effectiveness of the proposed methods. |
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| Keywords: | Lamb wave damage detection optimal mother wavelet embedded transducer information entropy |
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