Vandeputte J, Leroy O, Briers R, Shkerdin G
Interdisciplinary Research Center, Kortrijk, Belgium.
J Acoust Soc Am. 2000 Oct;108(4):1614-21. doi: 10.1121/1.1286097.
In the present study viscoelasticity is introduced in the mode model and the orthogonality condition is adapted for viscous media. The expansion of convergent acoustic Gaussian beams in terms of radiation modes for viscoelastic media is studied as well. The effects on the reflected and transmitted profiles of acoustic beams incident from an ideal liquid onto a viscoelastic plate are shown and physically explained. It is shown that focusing the incident beam can suppress divergence effects and gives the possibility to measure shear wave attenuation coefficients.
在本研究中，将粘弹性引入模式模型，并对粘性介质采用正交性条件。还研究了收敛声高斯光束在粘弹性介质中基于辐射模式的展开。展示并从物理角度解释了从理想液体入射到粘弹性板上的声束对反射和透射轮廓的影响。结果表明，聚焦入射光束可以抑制发散效应，并提供测量剪切波衰减系数的可能性。
