| Study of the influence of thin layer loading on the propagation of Lamb waves using perturbation method |
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| 引用本文： | LI Jian, ZHU Zhemin (Laboratory of Modern Acoustics Institute of Acoustics,Nanjing University Nanjing 210093)(Institute of Acoustics,Academia Sinica,Beijing 1OO080). Study of the influence of thin layer loading on the propagation of Lamb waves using perturbation method[J]. 声学学报：英文版, 1996, 0(3) |
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| 作者姓名： | LI Jian ZHU Zhemin (Laboratory of Modern Acoustics Institute of Acoustics Nanjing University Nanjing 210093)(Institute of Acoustics Academia Sinica Beijing 1OO080) |
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| 作者单位： | LI Jian; ZHU Zhemin (Laboratory of Modern Acoustics Institute of Acoustics，Nanjing University Nanjing 210093)(Institute of Acoustics，Academia Sinica，Beijing 1OO080) |
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| 摘 要： | I.IntroductionSincethepublicationoftheclassicalpaper"Onthewavesinanelasticplate"byH.Lambin1917l1l,theterm"LaInbwave"hasbeenusedtorefertoanelasticdisturbancepropagatinginasolidplatewithfreeboundaries.Lambwavesarewidelyusedintheapplicationsofthedefectinspectionofthinwa.lledmaterial[2'8].InrecelltyearsLambwaveshavebeenwide1yusedinthefabricationofsensors.LamInwavesensorsdetectthechangesofenvironmentbymeasuringthechangeofphasevelocityofLambwaves.IncomparisonwithbuIkwavesandSAW's,Lambwavsprovi…
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Study of the influence of thin layer loading on the propagation of Lamb waves using perturbation method |
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| LI Jian, ZHU Zhemin. Study of the influence of thin layer loading on the propagation of Lamb waves using perturbation method[J]. Chinese Journal of Acoustics, 1996, 0(3) |
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| Authors: | LI Jian ZHU Zhemin |
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| Abstract: | In many Lamb wav sensing applications, the changes of the environment of the plate to be detected are considered as small perturbations to the free boundary conditions of free Lamb wavs in a thin plate. General dispersion equations for Lamb waves in a plate with proper perturbed boundary conditions are derived. The equations are then applied to various sensing applications including viscous liquid layer loading and thin solid layer loading.Numerical solotions of the equations show that the phase velocity of Lamb waves changes linearly with the boundary impedance defined in this paper. |
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| Keywords: | Lamb waves Thin layer loading Perturbation method |
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