| Title |
Investigation of time-reversed ultrasonic waves focusing in multilayered media / |
| Translation of Title |
Laike apgręžtų ultragarso bangų fokusavimas daugiasluoksnėse struktūrose. |
| Authors |
Butėnas, G ; Kažys, R |
| Full Text |
|
| Is Part of |
Ultragarsas = Ultrasound.. Kaunas : Technologija. 2008, t. 63, Nr. 2, p. 43-48.. ISSN 1392-2114 |
| Keywords [eng] |
layered ; time-reversal ; focusing |
| Abstract [eng] |
In the paper we investigate the time-reversal approach application for non-destructive evaluation of layered structures and it is shown, that the time-reversal mirrors (TRM) can be used for detection of scattering sources in layered media and the time-reverted waves successfully pass through layer-stacking zones and refocuses to the initial source. The investigations were performed for two cases: 2-layered structure (liquid-solid) and 3-layered structure (liquid-solid-liquid). The results show that multiple reflections caused by different structure layers and boundaries were eliminated by the TRM. Wave energy does not dissipate after mode conversion at liquid-solid interfaces, but is redirected to waves which coincide in some arbitrary time instant. Numerical modeling was performed by finite element method using the commercially available software ABAQUS/Explicit. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2008 |
