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Sound field calculation method based on Gaussian beam

A calculation method, Gaussian-type technology, applied in the field of sound field calculation based on Gaussian-type sound beams, to solve the problem of slow calculation speed

Active Publication Date: 2019-07-23
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology

The ray algorithm is a high-frequency approximate solution of the wave equation. It can calculate the sound field at high frequencies. The calculation speed is fast, the physical meaning is clear, and it can adapt to the level changes of the medium and the boundary. However, the traditional ray method has some inherent shortcomings. Such as the appearance of focal shadow area and caustic area, and the problems caused by the search of intrinsic sound rays

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  • Sound field calculation method based on Gaussian beam
  • Sound field calculation method based on Gaussian beam
  • Sound field calculation method based on Gaussian beam

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with accompanying drawing:

[0039] Based on the theory of ray acoustics and combined with the Gaussian sound beam method, the present invention analyzes and calculates the sound field at high frequencies, so as to solve the inherent defects of the traditional method such as slow calculation speed and difficult processing of caustic regions. The Gaussian beam method is a method for dealing with the caustic problem, which is borrowed from the seismic field, and it relates each sound ray within the beam to a Gaussian intensity profile perpendicular to the sound ray. The two differential equations constraining the beam width and curvature are integrated with the standard ray equation to calculate the beam field near the beam center line. This method avoids the influence of human factors on the trajectory of sound rays, such as ideal sound shadow area and infinite energy on caustics. Furthermore, this t...

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Abstract

The invention discloses a sound field calculation method based on a Gaussian beam, and the method comprises the steps: building a hydroacoustic propagation model based on a Gaussian beam method, and carrying out the calculation and analysis of a sound field under a marine environment condition. According to the method, the ray acoustics theory and the Gaussian beam method are combined, sound fieldcalculation can be well conducted, the method is suitable for rapid calculation of the sound field under the high-frequency condition, and the occurrence of a focus shadow area and a defocus area iseffectively prevented. At present, the method is an effective method for calculating and analyzing the sound field under the marine environment condition in a certain test system applied to research.

Description

technical field [0001] The invention belongs to underwater acoustic scientific research and related fields, and mainly relates to a sound field calculation method based on a Gaussian sound beam. Background technique [0002] The study of the marine environment mainly involves the acoustic characteristics of the seawater medium and its boundaries (bottom, sea surface) and the laws that sound waves follow when propagating in the seawater medium. Although sound waves have good propagation performance in seawater, the seawater medium used as the transmission channel of acoustic signals has complex and changeable characteristics. The influence of factors on the sound field is impossible, so it is necessary to simulate the sound field of the ocean environment extensively through modeling, and construct a model of the ocean environment, so as to better conduct computational research on the ocean sound field. This achievement mainly analyzes and calculates the sound ray trajectory ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 胡宇刘彩红周洪嵩
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP