文献类型：期刊文献

英文题名：Prediction of Target-Induced Multipath Interference Acoustic Fields in Shallow-Sea Ideal Waveguides and Statistical Characteristics of Waveguide Invariants

作者：Zhang, Yuanhang[1];Zhang, Peizhen[1];Li, Jincan[1]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：13

期号：6

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001516748800001)、、EI(收录号：20252618679162)、Scopus(收录号：2-s2.0-105009006744)、WOS

基金：This research was funded by Guangdong Basic and Applied Basic Research Foundation Project, China (grant number 2023A1515240013) and supported by Foundation of Key Laboratory of Marine Intelligent Equipment and System (grant number MIES-2023-04).

语种：英文

外文关键词：interference fringe; multipath acoustic waves; range-frequency spectra; waveguide invariant

外文摘要：The acoustic scattering of targets in shallow-sea waveguides exhibits complex features such as multipath propagation and intricate echo components, with its acoustic field properties remaining incompletely understood. This study employs a hybrid method combining normal modes and scattering functions to numerically model the acoustic scattering of targets in waveguide channels. We analyze the coupling mechanisms of multipath acoustic waves and derive precise predictive formulas for the bright-dark interference fringe patterns in range-frequency spectra based on the physical mechanisms governing acoustic field interference. By tracking the peak trajectories of these interference fringes in range-frequency spectra, we investigate the variations of the waveguide invariant with frequency, range, and depth, revealing statistical patterns of the waveguide invariant in target-waveguide coupled scattering fields under different water depths. The results demonstrate that, under constant channel conditions, waveguide properties exhibit a weak correlation with target material characteristics. In shallow water environments, waveguide invariant values display broader distributions with higher probability density peaks, whereas increasing water depth progressively narrows the distribution range and monotonically reduces the peak magnitudes of the probability density function. Experimental validation via scaled elastic target echo testing confirms the observed trends of waveguide invariant variation with water depth.