摘要
当球面声波由介质1进入介质2时,如果波速c1<c2,则介质1中除了直射波和反射波以外,还有另一种测面波存在.侧面波的传播比反射波快.本文先从理论上阐明这一问题.然后,主要介绍如何利用自行研制的动态光弹仪从实验上验证侧面波的存在.
A spherical sonic wave propagates from medium 1 to medium 2. If the wave speeds c1<c2,then in medi-
um 1,besides the direct wave and reflected wave, there is an additional wave-the lateral wave. It propagates
faster than the reflected wave. In this article, the lateral wave is deduced theoretically, and an experimental
demonstration of its existence is described.
出处
《科技通报》
1992年第3期140-144,共5页
Bulletin of Science and Technology
关键词
侧面波
费马原理
波阵面
声学
lateral wave
Fermat's principle
Fourier's integral
wave front
Stress birefringence
dynamic photoelastic device.
