Acoustic Scattering Prediction Method of Underwater Vehicles Based on Slice-parameterized Multi-highlight Model

doi:10.12382/bgxb.2021.0764

Abstract

Abstract:

To deal with the problem of low accuracy of the elementary highlight model in forecasting the acoustic scattering characteristics of underwater vehicles, a highlight model which can reflect the real lines and fine acousitcscattering characteristics of underwater vehicles is established.The linear interpolation algorithm and object segmentation method are used to establish the parametric highlight model of the command station and stern, and the planar elements method is adopted to verify the results.On this basis, the acoustic scattering characteristics of the Benchmark submarine model including the command station and stern are studied and compared with the standard solution of the BASIS method.The target strength experiment results of the Benchmark submarine scale model are obtained through acoustic scattering experiments of the model on lake, and then compared with the method of highlight model.The results show that the proposed model is accurate.Considering the spatial phase information of each component, the highlight model can forecast the acoustic scattering characteristics of underwater vehicles well.The findings of this study can provide insights into the fast prediction of acoustic scattering of underwater targets and have broad application prospects in the fast time-domain echo forecasting.

Key words: highlight model, acoustic scattering characteristics, planar elements method, target strength, spatial phase

CLC Number:

TB566

LIU Jinwei, PENG Zilong, FAN Jun, LIU Yan, KONG Huimin. Acoustic Scattering Prediction Method of Underwater Vehicles Based on Slice-parameterized Multi-highlight Model[J]. Acta Armamentarii, 2023, 44(2): 517-525.

Figures/Tables 16

Fig.1 Benchmark 3D model and components decomposition

Fig.2 Schematic diagram of phase calculation of semi-elliptic cylinder combinedwith rectangular plate

Table 1 Highlight parameters of the command station in the range of 0~πrad

入射角θ/rad	传递函数H
θ≤β	H=T'₁
θ≤π/2	H=T'₁+I'₁
θ≤π-β	H=T'₂+I'₁
θ≤π	H=T'₂+I'₂

Fig.3 Results of planar elements method and highlight model method

Table 2 Computing time for the angular-frequency spectrum

参数	板块元	亮点模型
网格数量/个	14708	无
耗时/s	89.35	0.119

Fig.4 3D model of stern

Fig.5 Highlight model of elliptic cone

Fig.6 Schematic diagram of approximate elliptic cone

Fig.7 Results of planar elements method and highlight model method

Table 3 Computing time for the angular-frequency spectrum

参数	板块元	亮点模型
网格数量/个	10444	N=150
耗时/s	69.091	14.108

Fig.8 Schematic diagram of component phase calculation

Fig.9 Results of BASIS method and highlight model method

Fig.10 Sketch of test layout

Fig.11 Test scene diagram

Fig.12 Time-domain echo of Benchmark submarine scale model

Fig.13 Comparison between experimental results and highlight model results

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