| Title |
Analysis of the zero-crossing technique in relation to measurements of phase velocities of the S0 mode of the Lamb waves / |
| Another Title |
Lembo bangų S0 modos fazinio greičio matavimo signalo perėjimo per nulį metodu dėsningumų tyrimas. |
| Authors |
Draudvilienė, L ; Mažeika, L |
| Full Text |
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| Is Part of |
Ultragarsas = Ultrasound.. Kaunas : Technologija. 2010, t. 65, Nr. 3, p. 11-14.. ISSN 1392-2114 |
| Keywords [eng] |
Lamb wave ; symmetric mode ; asymmetric mode ; dispersion curves ; phase velocity ; zero-crossing technique |
| Abstract [eng] |
It was demonstrated by previous works that the regularities obtained in phased velocity measurement of A0 mode of Lamb waves using zero-crossing technique creates possibilities for identification of the modes. The objective of the work presented was to investigate the similar approach on the So mode of Lamb waves and to determines if difference of regularities is sufficient or strong enough to be used for mode identification. The signals obtained by finite element modelling of S0 mode in 2mm thickness aluminium plate were analysed. The excitation signal was 300 kHz burst with the Gaussian envelop It was demonstrated that the distribution of lower and higher frequency components in the signals are different for A0 and S0 modes, what can be exploited as criteria for mode identification. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2010 |
| CC license |
|
