| 双基地声纳目标低频散射特性研究 |
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| 引用本文： | 程广利,张明敏.双基地声纳目标低频散射特性研究[J].海军工程大学学报,2008,20(6). |
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| 作者姓名： | 程广利 张明敏 |
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| 作者单位： | 海军工程大学,电子工程学院,武汉,430033 |
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| 基金项目： | 国家部委基金资助项目
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海军工程大学自然科学基金资助项目
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| 摘 要： | 针对双基地声纳目标低频散射问题,从Helmholtz积分方程出发,采用等价面元解决表面积分存在的奇异性问题,建立了非入射方向水下目标散射声场的物理模型和计算方法.计算了刚性圆柱体的后向散射回声,绘出了在不同收发分置角、低频情况下,刚性椭球目标强度随目标姿态角的空间变化曲线,并分析了其散射特性.结果表明,提出的模型和方法能计算任意分置角和任意目标姿态角时的水下目标散射强度,可用于预报双基地声纳目标低频声散射特性.
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| 关 键 词： | 双基地声纳 低频散射 奇异性 散射强度 |
On low-frequency scattering characteristics of objects for bistatic sonar |
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| CHENG Guang-li,ZHANG Ming-min.On low-frequency scattering characteristics of objects for bistatic sonar[J].Journal of Naval University of Engineering,2008,20(6). |
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| Authors: | CHENG Guang-li ZHANG Ming-min |
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| Institution: | College of Electronic Engineering;Naval Univ.of Engineering;Wuhan 430033;China |
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| Abstract: | To study the low-frequency scattering characteristics of bistatic objects,a physical model of the scattering acoustical field for submerged objects with obliquely incident was set up and a calculation method was presented according to Helmholtz integral equation,in which the equivalent facet was used to overcome the singularity of surface integral.The proposed model and method was verified by the calculated backscattered echo from the rigid cylinder.Spatial distribution curves of scattering strength for the... |
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| Keywords: | bistatic sonar low-frequency scattering singularity scattering strength |
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