Excitation of Scholte Waves at a Sinusoidal Interface of Seafloor

Abstract

In this paper, an elastic seafloor with the sinusoidal interface is modeled to study the effect of the fluctuant interface on Scholte wave excitation. The reflection and transmission coefficients of sound waves are derived from the scattered wave theory to investigate the acoustic field characteristics. In numerical simulations, longitudinally invariant finite element models are constructed to demonstrate the excitation of Scholte waves at the seafloor. The effect of sinusoidal interface parameters on Scholte wave excitation is analyzed in this research. Results show that stronger Scholte waves still can be excited when the sound source is away from the seafloor with a sinusoidal interface. In this process of Scholte wave excitation, the period [Formula: see text] and height [Formula: see text] of sinusoidal interfaces are related to the excitation frequency and intensity, respectively.