Based on the theory of elastodynamics, the interaction of elasticsurface acoustic waves with surface-breaking defect is studied numerically by using the finite element method.
基于弹性动力学理论，采用有限元方法数值模拟了声表面波沿金属表面传播及其与表面缺陷相互作用的过程。
2
Two sorts of echoes caused by the reradiation of elasticsurface wave have been observed in experimentation: the radial surface backscattering wave and the longitudinal surface backscattering wave.
实验观测到两类由弹性表面波的再辐射产生的回波：径向表面反向散射波和纵向表面反向散射波。
3
Imagine an elastic band stretched over the surface of an apple. The band can slowly shrink, moving as though it is slipping from the surface, until it becomes just a dot on the apple's skin.