Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring
ZHANG Hai-Yan, CHEN Xian-Hua, CAO Ya-Ping, YU Jian-Bo
School of Communication and Information Engineering, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072
Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring
ZHANG Hai-Yan, CHEN Xian-Hua, CAO Ya-Ping, YU Jian-Bo
School of Communication and Information Engineering, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072
摘要The focusing of time reversal acoustic fields for dispersive and multimodal Lamb waves is theoretically investigated and experimentally verified. It is demonstrated that the time reversal Lamb wave signal will reach the maximum amplitude when the observation point is located at the damage location. Based on the time reversal focusing theory, a damage imaging method is proposed for structural health monitoring using Lamb waves. The experiments employ a transducer network consisting of four piezoelectric transducers as actuators and as well sensors for excitation and measurement of Lamb waves. The results show that this method is able to accurately predict damage location and provides an estimation of the possible area even for damage close to one of the transducers or even slightly outside the transducer network.
Abstract：The focusing of time reversal acoustic fields for dispersive and multimodal Lamb waves is theoretically investigated and experimentally verified. It is demonstrated that the time reversal Lamb wave signal will reach the maximum amplitude when the observation point is located at the damage location. Based on the time reversal focusing theory, a damage imaging method is proposed for structural health monitoring using Lamb waves. The experiments employ a transducer network consisting of four piezoelectric transducers as actuators and as well sensors for excitation and measurement of Lamb waves. The results show that this method is able to accurately predict damage location and provides an estimation of the possible area even for damage close to one of the transducers or even slightly outside the transducer network.
ZHANG Hai-Yan;CHEN Xian-Hua;CAO Ya-Ping;YU Jian-Bo
. Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring[J]. 中国物理快报, 2010, 27(10): 104301-104301.
ZHANG Hai-Yan, CHEN Xian-Hua, CAO Ya-Ping, YU Jian-Bo
. Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring. Chin. Phys. Lett., 2010, 27(10): 104301-104301.
[1] Xiang Y X, Xuan F Z and Deng M X 2010 Chin. Phys. Lett. 27 016202
[2] Wang X M, Liang G X and Li M X 2001 Chin. Phys. Lett. 18 1483
[3] Zhang B X, Wu H and Wang C H 2004 Chin. Phys. Lett. 21 337
[4] Lu M H, Zhang B X and Wang C H 2004 Chin. Phys. Lett. 21 1766
[5] Ing R K and Fink M 1998 IEEE Trans. Ultrason. Ferroelectr. Freq. Control. 45 1032
[6] Gangadharan R, Murthy C R L, Gopalakrishnan S and Bhat M R 2009 Ultrasonics 49 696
[7] Núñez I and Negreira C 2005 J. Acoust. Soc. Am. 117 1202
[8] Ulrich T J and Johnson P A 2006 J Acoust. Soc. Am. 119 1514
[9] Núñez I, Ing R K, Negreira C and Fink M 2000 J. Acoust. Soc. Am. 107 2370
[10] Ng C T and Veidt M 2009 Smart Mater Struct. 18 074006
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