| 时频分析在复合材料无损检测中的应用研究 |
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| 引用本文： | 胡勇,徐春广,周世圆,许寒辉.时频分析在复合材料无损检测中的应用研究[J].传感器与微系统,2009,28(8):14-17. |
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| 作者姓名： | 胡勇 徐春广 周世圆 许寒辉 |
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| 作者单位： | 北京理工大学,控制与检测实验室,北京,100081 |
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| 摘 要： | 随着复合材料检测的发展，Lamb波无损检测技术日益受到重视。根据Lamb波多模式和频散的特点，以群速度-频厚积曲线为基础，采用短时傅利叶变换（STFT）的时频分析方法，以层合板复合材料为实验对象，与单独在时域、频域中分析相比较，结果表明：STFT可有效地识别Lamb波的传播模式，并可准确地对能量成分进行分析。
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| 关 键 词： | 无损检测 复合材料 Lamb波 时频分析 |
Research on time-frequency analysis in non destructive testing for laminated composite material |
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| HU Yong,XU Chun-guang,ZHOU Shi-yuan,XU Han-hui.Research on time-frequency analysis in non destructive testing for laminated composite material[J].Transducer and Microsystem Technology,2009,28(8):14-17. |
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| Authors: | HU Yong XU Chun-guang ZHOU Shi-yuan XU Han-hui |
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| Affiliation: | HU Yong,XU Chun-guang,ZHOU Shi-yuan,XU Han-hui(School of Mechanical , Vehicular Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | Composite materials are used broadly in the domain of industry,and it is important to test those damages,especially non destructive testing.Based on the curve of group-frequency multiply thickness,a laminated plate is used as experimental object,Lamb waves are chosen as testing way,through time-frequency analysis,some effect of given defection in composite materials is determined.Compared with signal analysis which is based on time or frequency field respectively,time-frequency analysis can not only recogni... |
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| Keywords: | non destructive testing composite material Lamb waves time-frequency analysis |
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