Method for analyzing and fitting resonance frequency of underwater target

Abstract

The present application belongs to the technical field of underwater target resonance frequency analysis, and relates to an underwater target resonance frequency analysis and fitting method, comprising constructing a sea model, constructing a sea sound field according to a formula, obtaining a distance-frequency spectrum, calculating resonance frequencies under different propagation modes, and fitting the resonance frequencies with the distance-frequency spectrum. The present application uses the surrounding wave generated by the interaction between sound waves and underwater targets to predict the resonance frequency of the target, so as to solve the problems of large calculation amount and insufficient accuracy in traditional resonance frequency detection. The method uses the resonance characteristics generated by the interaction between sound waves and targets, analyzes the correlation between the resonance structure in the frequency spectrum and the target size and material, reduces the influence of sound signal attenuation and distortion on the imaging quality, and improves the definition and reliability of the sonar image. At the same time, the method reduces the interference of multipath effect on target detection, so as to extract the resonance frequency of the target, and enhances the stability and reliability of the underwater target resonance frequency fitting method.

Images