关键词: 弹性半空间, 理想流体层, Stoneley波, 动力特性, 特征方程, 弥散性

Abstract:

In order to reveal the dynamic properties of the Stoneley wave in elastic half-space-ideal fluid layer and further to provide a surveying method for exploring oceanic resources, a characteristic equation expressing the Stoneley wave in half-infinite solid-ideal fluid layer is derived based on the dynamic equations of elastic solid and i-deal fluid.According to the proposed characteristic equation,the influences of the physical characteristics of the solid and the fluid on the dynamic pressure of the fluid are analyzed,and the displacement distribution in the solid and the fluid are described.The results show that(1)the displacement distribution of the Stoneley wave in the solid is similar to that of the Rayleigh wave in half-space,while that in the fluid is obviously regular;and(2)the Stoneley wave in elastic half-infi nite solid-ideal fluid layer is dispersive,with a velocity less than that of the Rayleigh
wave in elastic half-space.

Key words: elastic half-space, ideal fluid layer, Stoneley wave, dynamic property, characteristic equation, dispersiveness