文献类型：期刊文献

英文题名：Mechanism interpretation and validation of stable interference fringe characteristics for multi-static near-bottom suspended targets

作者：Feng, Ziyi[1];Zhang, Peizhen[2];Deng, Qiwei[1]

机构：[1]Guangdong Ocean Univ, Coll Naval Architecture & Shipping, Zhanjiang 524005, Peoples R China;[2]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2026

卷号：368

外文期刊名：OCEAN ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001899431800001)、、EI(收录号：20264121611253)、Scopus(收录号：2-s2.0-105052472833)、WOS

基金：This study was supported by the Guangdong Basic and Applied Basic Research Foundation (Offshore Wind Power Joint Fund; Grant No. 2023A1515240013); the National Natural Science Foundation of China (Grant No. 11974084); and the Open Fund of the Key Laboratory of Marine Intelligent Equipment and System, Ministry of Education (Grant No. 300702/B2470).

语种：英文

外文关键词：Underwater targets; Finite element method; Seabed acoustic scattering; Interference fringes

外文摘要：To quantitatively describe complex echo-spectrum interference fringes and key peak features under multipath coupling between flat-seabed interface reflection and target scattering, this study establishes a two-dimensional finite element model for a flat seabed and investigates the scattering characteristics of suspended targets under multi-static conditions. Based on multipath geometry and phase-interference analysis, the physical mechanism by which stable spectral interference fringes are formed by phase differences among dominant scattering paths is clarified. Based on the Biot-Stoll poroelastic theory, coarse-sand and clay seabed models were established to investigate the effects of grazing angle and target suspension height on the interference-fringe structure and scattering strength. The numerical results show that the overall distribution of the dominant interference fringes remains relatively stable under different seabed conditions, while seabed properties have a more pronounced influence on echo-intensity levels. Meanwhile, the seabed reflection phase and target elastic-scattering phase may induce local shifts in the peak positions. On this basis, a key-peak prediction method for interference fringes is proposed based on multipath geometric relationships, enabling quantitative characterization of fringe peak position, number, and intensity under the effects of suspension height and grazing angle. The effectiveness of the method is validated by scaled water-tank experiments.