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基于Lamb波频散特性的声发射源平面定位新方法

龚仁荣, 顾建祖, 骆 英, 柳祖亭

龚仁荣, 顾建祖, 骆 英, 柳祖亭. 基于Lamb波频散特性的声发射源平面定位新方法[J]. 无损检测, 2006, 28(10): 521-525.
引用本文: 龚仁荣, 顾建祖, 骆 英, 柳祖亭. 基于Lamb波频散特性的声发射源平面定位新方法[J]. 无损检测, 2006, 28(10): 521-525.
GONG Ren-rong, GU Jian-zu, LUO Ying, LIU Zu-ting. New Methods of Planar Location of Acoustic Emission Source Based on the Dispersive Characteristics of Lamb Wave[J]. Nondestructive Testing, 2006, 28(10): 521-525.
Citation: GONG Ren-rong, GU Jian-zu, LUO Ying, LIU Zu-ting. New Methods of Planar Location of Acoustic Emission Source Based on the Dispersive Characteristics of Lamb Wave[J]. Nondestructive Testing, 2006, 28(10): 521-525.

基于Lamb波频散特性的声发射源平面定位新方法

基金项目: 

国家自然科学基金资助项目(50375069);江苏省教育厅“青蓝工程”项目资助

详细信息
    作者简介:

    龚仁荣(1979-),男,硕士研究生,主要从事无损检测、智能材料与结构的研究。

  • 中图分类号: TG115.28

New Methods of Planar Location of Acoustic Emission Source Based on the Dispersive Characteristics of Lamb Wave

  • 摘要: 针对传统的声发射源平面定位中各传感器灵敏度差异和门槛值设置不同对时差定位精度影响较大的问题,通过研究弹性波在薄板中传播的特性即Lamb板波频散特性,借用模态声发射的概念将单个传感器接收到的信号利用Gabor小波时频分析得到不同模态的峰值到达时间,并在引入速度因子概念的基础上,讨论了两种不同的声发射源平面定位方法,即同一频率不同模态的定位方法和同一模态不同频率的定位方法,试验证明两种方法都能得到模拟源的正确定位,不仅从根本上避免了传感器间灵敏度差异对时差定位精度的影响,而且还可以减少平面定位中传感器的数量,避免三角形定位中伪定位的出现,并适用于传统的声发射源平面定位中不易布置传感器阵列的结构健康无损监测。
    Abstract: In order to solve the problem that different sensitivities among various sensors and threshold settings have a great influence on the accuracy of arrival time-difference location in traditional location of acoustic emission source, two new approaches of planar location are presented based on the research of dispersive characteristics of Lamb wave, arrival time of different modes determined by using the peak of the magnitude of Gabor wavelet time-frequency analysis on the view of modal acoustic emission and introduced velocity factor. One method of location is based on the same frequency and different modes and the other is based on the same mode and different frequency. The two methods whose accuracy is demonstrated by experiments can solve the proposed problem completely, reduce the number of sensors in planar location, avoid false location in traditional triangular location and be used to monitor structures which are not feasible for the traditional method of source location.
  • [1] 袁振明,马羽宽,何泽云.声发射技术及其应用\[M\].北京:机械工业出版社,1985.
    [2] Grosse Christian U, Finck Florian, Kurz Jochen H, et al. Improvements of AE technique using wavelet algorithms, coherence functions and automatic data analysis[J]. Construction and Building Materials,2004,18(3):203-213.
    [3] Ding Y, Reuben RL, Steel JA. A new method for waveform analysis for estimating AE wave arrival times using wavelet decomposition[J]. NDT&E International,2004,37(4):279-290.
    [4] Jingpin Jiao, Cunfu He, Bin Wu, et al. Application of wavelet transform on modal acoustic emission source location in thin plates with one sensor[J]. International Journal of Pressure Vessels and Piping,2004,81(5):427-431.
    [5] Koh YL, Chiu WK, Rajic N. Effects of local stiffness changes and delamination on Lamb wave transmission using surface-mounted piezoelectric transducers[J]. Composite Structures,2002,57(1):437-443.
    [6] Steven M, Ziola SM, Gorman MR. Source location in thin plates using cross-correlation[J]. J Acoust Soc Am,1991,90(5):2551-2556.
    [7] Surgeon M, Wavers M. One sensor linear location of acoustic emission events using plate wave theories[J]. Materials Science and Engineering,1999,A265(1-2):254-261.
    [8] Hyunjo Jeong, Young-Su Jang. Wavelet analysis of plate wave propagation in composite laminates[J]. Composite Structures,2000,49(4):443-450.
    [9] 耿荣生,沈功田,刘时风.模态声发射[J].无损检测,2002,24(8):341-345.
    [10] 杨桂通,张善元.弹性动力学\[M\].北京:中国铁道出版社,1988.153-168.
    [11] 罗斯 JL著,何存富译.固体中的超声波\[M\].北京:科学出版社,2004.
    [12] Gaul L, Hurlebaus S. Identification of the impact location on a plate using wavelets[J]. Mechanical Systems and Signal Processing,1997,12(6):783-795.
    [13] 沈功田,耿荣生,刘时风.声发射源定位技术[J].无损检测,2002,24(3):114-125.
    [14] 姚 力,赖德明.声发射源定位不确定度的计算[J].无损检测,2002,24(11):461-463.
    [15] 刘镇清,黄瑞菊.薄板声-超声检测超声传播模式的实验研究[J].声学学报,2000,25(3):268-273.
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出版历程
  • 收稿日期:  2005-06-22
  • 刊出日期:  2006-10-09

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