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基于改进HHT的多模式Lamb波信号的时频分析 被引量：4

Time-Frequency Analysis of Multi-Mode Lamb Waves by Improved HHT
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摘要 Hilbert-Huang变换(HHT)是一种新的分析非平稳非线性信号的方法,是用经过带通滤波器组滤波后再进行HHT分析的方法。使用该方法对多模式Lamb波信号进行了分析,能有效分离信号中的各固有模态函数(IMF)分量,消除了噪声干扰。改进HHT变换结果的图线光滑清晰,可解释性好,使用该方法对Lamb波进行分析具有可行性和有效性。 Hilbert-Huang transform is a new method to analyze non-stationary and non-linear signals. The multi-mode Lamb wave signals were analyzed by an improved HHT method, which combined band-pass filter group with HHT analysis. Using this technique, the Intrinsic Mode Function, IMF components were separated efficiently and the noise was suppressed dramatically, which suggested that this method was feasible and effective for Lamb wave analysis.
作者 郑祥明 王杜 杨齐 唐正连 张春
机构地区 宁波工程学院机械工程学院 宁波市特种设备检验检测中心 武汉科技大学信息科学与工程学院 湖北汽车工业学院材料工程系
出处 《无损检测》 北大核心 2008年第5期271-274,311,共5页 Nondestructive Testing
基金 湖北省自然科学基金资助项目(2004ABA019) 湖北省教育厅资助项目(2004D009) 宁波市自然科学基金资助项目(2006A610025)
关键词 超声波检测 兰姆波 时频分析 HILBERT-HUANG变换 Ultrasonic testing Lamb waves Time-frequency analysis Hilbert-Huang transform
分类号 TG115.285 [金属学及工艺—物理冶金]
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参考文献7

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二级参考文献28

共引文献278

同被引文献27

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  • 10司祯祯.傅里叶变换与小波变换在信号去噪中的应用[J].电子设计工程,2011,19(4):155-157. 被引量：50

引证文献4

二级引证文献12

无损检测
2008年 第5期

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