海洋环境参数对Scholte波特性的影响

采用半无限海底的Scholte波模型并将其推广至分层海底,在直角坐标系下利用流体和弹性体中的波动方程,提出基于水平分层弹性海底模型的Scholte波的求解方法,结合简正波理论分析了Scholte波的频散特性及其质点运动轨迹和质点位移的传播特性,并分析了海洋环境参数(声速与海底参数)对Scholte波传播特征的影响.结果表明,Scholte波受海底介质中横波声速的影响最大,其频散曲线转折点可用于估算弹性沉积层厚度.

Influence of Ocean Environment Parameters on Scholte Wave

Abstract： Based on the Scholte wave model with half space ocean bottom, the bottom model was extended to the horizontal stratified medium. With the wave equation of fluids and elastic solids in cartesian coordinates, the solution to Scholte wave, which was based on layered elastic ocean bottom model, was proposed. The particle orbits and displacement were also discussed using the normal modes theory. The influence of ocean environments (including sound speed profile and ocean bottom parameters) on the propagation of Scholte wave was studied. The simulation results show that the shear wave of elastic bottom has the greatest influence on Scholte wave, and the inflexion of its dispersion curve can be used to estimate the thickness of sediment.