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利用一次夏季浅海水文实验资料,数值仿真研究有线性内波和孤立子内波存在条件下的匹配场时间相关性。考察和总结了有内波存在时不同声源频率、声源深度和内波幅度等参数对匹配场时间相关的影响。研究结果表明:由于内波与声场的相互作用,匹配场时间相关长度会随着线性内波的平均能流密度及孤立子内波幅度的增大而减小;频率越高,声波穿过内波场时的匹配场时间相关下降的越快;声源位于跃层下时的匹配场时间相关明显的优于跃层上的情况;孤立子内波距声源的位置对匹配场时间相关影响相对较小。
Using a summer shallow sea hydrological experimental data, the numerical simulation studies the temporal correlation of matching fields in the presence of linear internal waves and soliton internal waves. The influences of different sound source frequency, sound source depth and internal wave amplitude on the time-dependent of the matching field are investigated and summarized. The results show that due to the interaction between the internal wave and the sound field, the correlation length of the matching field decreases with the increase of the average energy density of the linear internal wave and the amplitude of the soliton’s internal wave. The higher the frequency, The correlation time of the matching field in the wave field declines more rapidly; the time correlation of the matching field when the sound source is in the jump layer is obviously better than that in the jump layer; Relatively small.