三相海底中的非线性声波产生
Nonlinear acoustic wave generation in a three-phase seabed
摘要：
本文研究了由固体框架和含有气泡的孔隙水组成的三相海洋沉积物中两个泵声波产生声波的情况，为了避免形成激波，在存在显著声速频散的频率范围内考虑了相互作用。得到的非线性方程描述的声波在气泡的存在下的相互作用。所产生的波的振幅的表达式，并进行其依赖于距离和气泡的共振频率的数值分析。
英文摘要：
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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