Experimental and numerical investigations on the dispersion behaviors of wedge waves propagating along wedges with bilinear cross sections

Experimental and numerical investigations on the dispersion behaviors of wedge waves propagating along wedges with bilinear cross sections

Wedge waves (WW) are guided acoustic waves propagating along the tip of a wedge, with energy tightly confined near the apex. This study is focused on exploring the dispersion behaviors of WW propagating along a bilinear wedge (BW). A BW is wedge with a cross section of two apex angles, compared with...

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Veröffentlicht in:Ultrasonics 2006-12, Vol.44, p.e1471-e1474
Hauptverfasser: Yang, Che-Hua, Tsen, Chun-Zen
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Sprache:eng
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Bilinear wedge
Dispersion
Laser ultrasound technique
Mode coupling
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description Wedge waves (WW) are guided acoustic waves propagating along the tip of a wedge, with energy tightly confined near the apex. This study is focused on exploring the dispersion behaviors of WW propagating along a bilinear wedge (BW). A BW is wedge with a cross section of two apex angles, compared with a linear wedge (LW) having a single apex angle. In the literature, many studies regarding to the dispersion behaviors of ASF modes are reported for LW, but not for BW. In this study, a combined experimental and numerical stidy is used to investigate the dispersion behavior of WW propagating in BW’s. It is found out that WW in a BW is a result of mode coupling between the two WW’s corresponding to simple wedges with the two apex angles of the BW.
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subjects Bilinear wedge
Dispersion
Laser ultrasound technique
Mode coupling
title Experimental and numerical investigations on the dispersion behaviors of wedge waves propagating along wedges with bilinear cross sections
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