A study of the Spectral Behavior of Laser-generated Lamb Waves using Wavelet Transforms
نویسندگان
چکیده
This paper deals with the study of the spectral components of Lamb waves generated in thin aluminium plate using pulsed Nd-YAG laser and detected using a He-Ne Laser Heterodyne interferometer. Laser generation of Lamb waves leads to simultaneous generation of various frequency component as well as multiple Lamb wave modes. The Lamb wave signals are successfully and comprehensively analyzed using Wavelet transform technique. The velocities of various frequencies present in the Lamb wave signal are calculated and the experimental dispersion curve is plotted. The behavior of various frequency components with respect to reflection from plate ends is explained satisfactorily.
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