基于非频散信号构建的Lamb波高分辨率损伤成像方法

doi:10.7527/S1000-6893.2013.0125

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基于非频散信号构建的Lamb波高分辨率损伤成像方法

蔡建^1,2,3, 石立华², 卿新林¹, 杜朝亮¹

1. 中国商用飞机有限责任公司北京民用飞机技术研究中心, 北京 102211;
2. 解放军理工大学电磁环境效应与光电工程国家级重点实验室, 江苏南京 210007;
3. 南京航空航天大学机械结构力学及控制国家重点实验室, 江苏南京 210016

收稿日期:2012-11-06 修回日期:2013-02-19 出版日期:2013-08-25 发布日期:2013-03-08
通讯作者: 卿新林 E-mail:qingxinlin@comac.cc
作者简介:蔡建男,博士,工程师。主要研究方向:结构健康监测、测试信号处理。Tel:010-57808726 E-mail:caijian2@com;ac.cc;石立华男,博士,教授,博士生导师。主要研究方向:超声无损检测、电磁兼容试验技术。Tel:025-80821382 E-mail:shilhnj@163.com;卿新林男,博士,研究员,博士后导师。主要研究方向:多功能传感网络、健康管理系统、结构健康监测、智能材料与结构。Tel:010-57808828 E-mail:qingxinlin@com;ac.cc;杜朝亮男,博士,工程师。主要研究方向:结构健康监测、定量化裂纹监测。Tel:010-57808719 E-mail:duchaoliang@com;ac.cc
基金资助:
国家自然科学基金(11172053,10872217);国家"863"计划(2012AA040209);上海市博士后科学基金(12R21421900)

Lamb Wave High-resolution Damage Imaging Method Based on Non-dispersive Signal Construction

CAI Jian^1,2,3, SHI Lihua², QING Xinlin¹, DU Chaoliang¹

1. Beijing Aeronautical Science and Technology Research Institute, COMAC, Beijing 102211, China;
2. National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering, PLA University of Science and Technology, Nanjing 210007, China;
3. National Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2012-11-06 Revised:2013-02-19 Online:2013-08-25 Published:2013-03-08
Supported by:
National Natural Science Foundation of China (11172053, 10872217);National High-tech Research and Development Program of China (2012AA040209);Shanghai Postdoctoral Science Foundation (12R21421900)

摘要/Abstract

摘要：

Lamb波损伤成像是结构健康监测的研究热点之一,然而在实际应用中,成像分辨率很容易受到Lamb波频散特性的影响。本文研究了非频散信号构建(ND-SC)的频散补偿方法并用于提高Lamb波成像分辨率。根据频域中建立的Lamb波传感模型,分析了ND-SC原理,并分别按照宽带激励和窄带激励两种情况对ND-SC的实现方式进行了讨论。随后结合经典的延迟叠加算法提出了高分辨率损伤成像方法。针对铝板的实验结果证明了本文提出的ND-SC方法和高分辨率损伤成像方法的有效性。

关键词: Lamb波, 频散补偿, 损伤成像, 分辨率, 信号构建

Abstract:

Lamb wave damage imaging is one of the focal research issues in structural health monitoring. However, in practical applications, the imaging resolution is easily affected by the dispersion characteristics of Lamb waves. An dispersion compensation method of non-dispersive signal construction (ND-SC) is studied in this paper to improve Lamb wave imaging resolution. Based on the Lamb wave sensing model established in frequency domain, the theory of ND-SC is analyzed. In addition, the realization of ND-SC is discussed under broadband excitation and narrowband excitation, respectively. Subsequently, associated with the classic delay-and-sum algorithm, a high-resolution damage imaging method is developed. The efficiency of the ND-SC and high-resolution damage imaging methods proposed in this paper is proved by experimental results in an aluminum plate.

Key words: Lamb wave, dispersion compensation, damage imaging, resolution, signal construction

中图分类号:

蔡建, 石立华, 卿新林, 杜朝亮. 基于非频散信号构建的Lamb波高分辨率损伤成像方法[J]. 航空学报, 2013, 34(8): 1815-1823.

CAI Jian, SHI Lihua, QING Xinlin, DU Chaoliang. Lamb Wave High-resolution Damage Imaging Method Based on Non-dispersive Signal Construction[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(8): 1815-1823.

参考文献

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[16] Cai J, Shi L H, Yuan S F. Improved "delay-and-sum" imaging method for adjacent multi-damages. Journal of Vibration and Shock, 2011, 30(8): 67-71. (in Chinese) 蔡建, 石立华, 袁慎芳. 一种改进的近邻多损伤"移相叠加"成像方法. 振动与冲击, 2011, 30(8): 67-71.

E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于非频散信号构建的Lamb波高分辨率损伤成像方法

Lamb Wave High-resolution Damage Imaging Method Based on Non-dispersive Signal Construction

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