水下航行体分片参数化多亮点声散射预报方法研究

doi:10.12382/bgxb.2021.0764

摘要/Abstract

摘要：

针对现有亮点模型预报水下航行体声散射特性精细程度不高的问题,建立能反映水下航行体真实线型以及精细声散射特征的亮点模型。采用线性插值算法和分割目标方法建立指挥台和艉部的参数化亮点模型,并采用板块元方法对建模结果进行验证。对包含指挥台和艉部在内的Benchmark潜艇模型声散射特性开展建模研究,并与BASIS方法的标准解进行对比。通过开展Benchmark缩比潜艇模型声散射湖上试验,获取Benchmark缩比潜艇模型目标强度测量结果,并与亮点模型方法进行对比。研究结果表明,建立的指挥台和艉部参数化亮点模型是准确的,将各部件的空间相位信息考虑在内,亮点模型能够预报水下航行体的精细声散射特征。研究结果对水下目标声散射快速预报具有一定的参考价值,在快速时域回波预报方面应用前景广阔。

关键词: 亮点模型, 声散射特性, 板块元方法, 目标强度, 空间相位

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

中图分类号:

TB566

刘进伟, 彭子龙, 范军, 刘妍, 孔慧敏. 水下航行体分片参数化多亮点声散射预报方法研究[J]. 兵工学报, 2023, 44(2): 517-525.

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.

图/表 16

图1 Benchmark三维模型和部件分解

Fig.1 Benchmark 3D model and components decomposition

图2 半椭圆柱组合矩形平板相位计算示意图

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

表1 0~πrad范围内指挥台的亮点参数

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

图3 板块元方法与亮点模型方法计算结果

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

表2 计算角度-频率谱所需时间

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

图4 艉部三维模型

Fig.4 3D model of stern

图5 椭圆锥台亮点模型

Fig.5 Highlight model of elliptic cone

图6 椭圆锥台近似示意图

Fig.6 Schematic diagram of approximate elliptic cone

图7 板块元方法与亮点模型方法计算结果

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

表3 计算角度-频率谱所需时间

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

图8 部件相位计算示意图

Fig.8 Schematic diagram of component phase calculation

图9 BASIS方法与亮点模型方法计算结果

Fig.9 Results of BASIS method and highlight model method

图10 试验布放示意图

Fig.10 Sketch of test layout

图11 试验场景图

Fig.11 Test scene diagram

图12 Benchmark缩比潜艇模型时域回波

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

图13 Benchmark模型试验结果与亮点模型方法对比

Fig.13 Comparison between experimental results and highlight model results

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