Nonlinear acoustic wave generation in a three-phase seabed
A.B. Kukarkin, N.I. Pushkina, and Ya.M. Zhileikin
TL;DR
This paper investigates how nonlinear acoustic waves are generated in a three-phase seabed with air bubbles, focusing on dispersion effects and deriving equations for wave interaction and amplitude.
Contribution
It introduces nonlinear equations for acoustic wave interaction in a three-phase seabed with air bubbles, considering dispersion effects to prevent shock formation.
Findings
Amplitude of generated wave depends on distance and bubble resonance frequency
Nonlinear equations effectively describe wave interaction in bubbly sediments
Numerical analysis reveals key parameters influencing wave amplitude
Abstract
Generation of an acoustic wave by two pump sound waves is studied in a three-phase marine sediment that consists of a solid frame and the pore water with air bubbles in it. To avoid shock-wave formation the interaction is considered in the frequency range where there is a significant amount of sound velocity dispersion. Nonlinear equations are obtained to describe the interaction of acoustic waves in the presence of air bubbles. An expression for the amplitude of the generated wave is obtained and numerical analysis of its dependence on distance and on the resonance frequency of bubbles is performed.
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