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将舰船水压场激励的海底地震波简化为液固多层半无限空间中集中力引起的地震波动问题,基于波数积分方法,通过FFP数值积分求解了海底表面声压、位移和加速度幅值,得到了海底表面声压、位移和加速度的频率特性曲线。结果表明,水压场激励的海底地震波频率很低,属于超低频波动信号;水压场引起海底表面的声压、竖直加速度和水平加速度在频域内基本呈现单峰型特征。
Based on the wave number integration method, the submarine surface acoustic wave excited by the water pressure field is simplified to the seismic fluctuation caused by the concentrated force in the liquid-solid multi-layered semi-infinite space. The sound pressure, displacement and acceleration amplitude of the sea surface are solved by FFP numerical integration, The frequency characteristics of the sound pressure, displacement and acceleration of the sea surface are obtained. The results show that the frequency of submarine seismic waves excited by water pressure field is very low and belongs to the ultra-low frequency fluctuation signal. The sound pressure, vertical acceleration and horizontal acceleration caused by water pressure field in the sea surface basically exhibit single peak characteristics in frequency domain.