北极色散中断现象与声源深度估计
Arctic Dispersion Interruption Phenomenon and Sound Source Depth Estimation
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中文总结 AI 辅助
研究北极深海声速剖面形成的色散中断现象，提出结合接收信号中断频率与海洋声速剖面的声源深度估计方法，经仿真和实验验证有效。
中文摘要 AI 辅助
北极深海的声速剖面使表层形成简正波导。当声源或接收器深度接近本征函数节点时，声源无法激发该模式，或接收器无法检测到，导致接收器处的模式振幅近似为零，这表现为色散结构中的色散中断，可通过对接收声信号的时频分析观测到。基于从接收信号识别出的中断频率，结合由海洋声速剖面计算得到的节点深度与模式频率的关系，若已知接收器深度，即可估计声源深度。色散中断现象及声源深度估计方法已通过仿真和实验验证。
英文摘要
The sound speed profile in the deep Arctic Ocean causes the surface layer to form a normal mode waveguide. When the depth of the sound source or receiver is near a node of the eigenfunction, the source cannot excite the mode, or the receiver cannot detect it, resulting in the modal amplitude at the receiver being approximately zero. This manifests as a dispersion interruption in the dispersion structure, which can be observed through time-frequency analysis of the received acoustic signal. Based on the interruption frequency identified from the received signal, combined with the relationship between node depth and modal frequency calculated from the ocean sound speed profile, the source depth can be estimated if the receiver depth is known. The phenomenon of dispersion interruption and the method of estimating source depth have been validated through simulations and experiments.
发表机构
- Third Institute of Oceanography, Ministry of Natural Resources（自然资源部第三海洋研究所）
机构由 AI 辅助整理，请以论文原文为准。
