基于非频散信号构建的Lamb波高分辨率损伤成像方法
收稿日期: 2012-11-06
修回日期: 2013-02-19
网络出版日期: 2013-03-08
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
Received date: 2012-11-06
Revised date: 2013-02-19
Online 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)
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 . DOI: 10.7527/S1000-6893.2013.0125
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
[1] Yuan S F, Liang D K, Shi L H, et al. Recent progress on distributed structural health monitoring research at NUAA. Journal of Intelligent Material Systems and Structures, 2008, 19(3): 373-386.
[2] Qing X L, Beard S J, Kumar A, et al. Advances in the development of built-in diagnostic system for filament wound composite structures. Composites Science and Technology, 2006, 66(11-12): 1694-1702.
[3] Qiu L, Yuan S F. On development of a multi-channel PZT array scanning system and its evaluating application on UAV wing box. Sensors and Actuators A: Physical, 2009, 151(2): 220-230.
[4] Xu Y D, Yuan S F, Peng G. Study on two-dimensional damage location in structure based on active Lamb wave detection technique. Acta Aeronautica et Astronautica Sinica, 2004, 25(5): 476-479. (in Chinese) 徐颖娣, 袁慎芳, 彭鸽. 二维结构损伤的主动Lamb波定位技术研究. 航空学报, 2004, 25(5): 476-479.
[5] Yu L, Giurgiutiu V. In-situ optimized PWAS phased arrays for Lamb wave structural health monitoring. Journal of Mechanics of Materials and Structures, 2007, 2(3): 459-487.
[6] Wang L, Yuan F G. Damage identification in a composite plate using prestack reverse-time migration technique. Structural Health Monitoring, 2005, 4(3): 195-211.
[7] Leonard K R, Malyarenko E V, Hinders M K. Ultrasonic Lamb wave tomography. Inverse Problems, 2002, 18(6): 1795-1808.
[8] Zhao X, Gao H, Zhang G, et al. Active health monitoring of an aircraft wing with embedded piezoelectric sensor/actuator network: I. defect detection, localization and growth monitoring. Smart Materials and Structures, 2007, 16(4): 1208-1217.
[9] Wang C H, Rose J T, Chang F G. A synthetic time-reversal imaging method for structural health monitoring. Smart Materials and Structures, 2004, 13(2): 415-423.
[10] Wang Q, Yuan S F. Baseline-free imaging method based on new PZT sensor arrangements. Journal of Intelligent Material Systems and Structures, 2009, 20(14): 1663-1673.
[11] Wilcox P, Lowe M, Cawley P. The effect of dispersion on long-range inspection using ultrasonic guided waves. NDT&E International, 2001, 34(1): 1-9.
[12] Cai J, Shi L H, Yuan S F, et al. High spatial resolution imaging for structural health monitoring based on virtual time reversal. Smart Materials and Structures, 2011, 20(5): 055018-55028.
[13] Liu L, Yuan F G. A linear mapping technique for dispersion removal of Lamb waves. Structural Health Monitoring, 2010, 9(1): 75-86.
[14] Cai J, Shi L H, Yuan S F, et al. A virtual time reversal method based on broadband excitation. Chinese Journal of Scientific Instrument, 2011, 32(1): 218-224. (in Chinese) 蔡建, 石立华, 袁慎芳, 等. 一种基于宽带激励的虚拟时间反转方法. 仪器仪表学报, 2011, 32(1): 218-224.
[15] Michaels J E. Detection, localization and characterization of damage in plates with an in situ array of spatially distributed ultrasonic sensors. Smart Materials and Structures, 2008, 17(3): 1-15.
[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.
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