| 三种时频分析在复合材料无损检测中的应用 |
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| 引用本文： | 李迎.三种时频分析在复合材料无损检测中的应用[J].航空计测技术,2011(6):1-3,20. |
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| 作者姓名： | 李迎 |
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| 作者单位： | 深圳职业技术学院机电工程学院,广东深圳518055 |
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| 基金项目： | 国家自然科学基金资助项目（50135030）; 航空科学基金资助项目（03I52067） |
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| 摘 要： | 随着复合材料的广泛应用和现代信号处理技术的发展,时频分析方法已广泛应用于各类复合材料的损伤检测。将短时傅立叶变换、小波变换和黄氏变换三种时频分析技术经过Matlab编程,结合Lamb波应用于玻璃纤维增强的复合材料层合板的无损检测,并对三种时频结果进行比较与分析。结果表明：上述三种时频分析方法都能进行复合材料的损伤判定,但黄氏变换方法的分析精度更高。
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| 关 键 词： | 时频技术 短时傅立叶变换 小波变换 黄氏变换 复合材料损伤判定 |
Applications of Three Time-frequency Methods on Composite Material Damage Detection |
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| LI Ying.Applications of Three Time-frequency Methods on Composite Material Damage Detection[J].Aviation Metrology & Measurement Technology,2011(6):1-3,20. |
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| Authors: | LI Ying |
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| Institution: | LI Ying(Shenzhen Polytechnic School of Mechanical and Electrical Engineering,Shenzhen 518055,China) |
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| Abstract: | Along with the application of composite material and development of signal disposal,time-frequency method has gotten extensive application in composite material damage detection.In this paper,three time-frequency technology are discussed and programmed with Matlab,including STFT,wavelet transform and HHT.Taking Lamb wave as pumping signal,damage detection tests were process,and the three time-frequency technology are used to analyse the results.Experimental results show that the three time-frequency methods are effective,but HHT can achieve higher precision than the others in processing composite damage detection. |
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| Keywords: | time-frequency technology STFT wavelet transform HHT damage detection for composite material |
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