Method and system for improving ocean sound field forecasting precision and medium

Abstract

The invention discloses a method and a system for improving ocean sound field forecasting precision and a medium. The method comprises the steps: S1, obtaining the field measurement data of a to-be-measured ocean underwater sound field and the parameter information of a sound source, building a cylindrical coordinate system underwater sound Helmholtz equation in a horizontal layered ocean environment, and obtaining a depth equation after transformation; S2, establishing sound vectors of upper and lower boundaries of a sound field; S3, transmitting the sound vectors from the upper boundary andthe lower boundary to a middle depth; S4, establishing a sound vector equation at the middle depth, solving the vertical vibration velocities of the upper boundary and the lower boundary, and calculating the sound pressure wave number kernel function of each layer; S5, performing horizontal wave number integration on the sound pressure wave number kernel function to obtain a sound pressure value of a receiving depth; and S6, calculating a propagation loss curve of the receiving depth, and forecasting the to-be-measured ocean sound field. According to the invention, sound field forecasting canbe realized based on marine environment measurement data, and the marine sound field forecasting precision can be improved.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic field detection, in particular to a method, system and medium for improving the accuracy of ocean acoustic field prediction. Background technique [0002] Acoustic waves can travel long distances in seawater media, and are currently the main information carrier for underwater acoustic communication, seawater and seabed environment detection, and underwater target positioning, and have important application values ​​in military and economic fields. Since the underwater sound propagation characteristics are closely related to the sound velocity and density distribution of seawater and sediment layers, it is generally necessary to establish an appropriate underwater acoustic model to describe the relationship between the sound pressure variable and the acoustic parameters of the environmental medium and sound source parameters. Finally, the underwater acoustic propagation characteristics ...

AI Technical Summary

Problems solved by technology

However, the above traditional methods have great shortcomings when used in deep sea conditions, especially when the sound source is close to the sea surface, the distance from the lower boundary acoustic vector to the depth of the sound source is very far, and the calculation stability is poor (horizontal wave number exceeds The calculation interruption occurs soon after the wave number of the medium), which leads to a large error in the integral calculation of the sound pressure wave number at the depth near the sound source, thereby reducing the prediction accuracy of the sound field

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