收、发分置混响平均强度理论预报

基金项目:

水声技术重点实验室基金(9140C200101080C2005)

哈尔滨工程大学基础研究基金(HEUFT07072)资助项目。

详细信息

The prediction of bistatic reverberation average strength

National Laboratory of Underwater Acoustic Technology, Harbin Engineering University Harbin 150001

摘要: 建立双基地混响几何模型,推导出收、发分置混响的平均强度估算公式。考察双基地远程界面混响,对于漫散射界面,散射区为一椭圆环带,分别给出柱面波声场和球面波声场情况下,无指向性收、发分置混响的平均强度估算公式。给出窄波束接收阵时,双基地声呐的混响级和信混比的估算公式。仿真表明,椭圆模型可以方便准确的预报双基地混响强度及研究其特征规律,便于双基地声呐系统集成,适合工程应用。

Abstract: Establish a model for bistatic reverberation,deduce formulas for computing bistatic reverberation average strength.Considering long-distance interface bistatic reverberation,of which the scattering area is elliptical ring,giving the estimating formula of non-directivity bistatic reverberation strength on the condition of cylinder and sphere sound field.Give the expression of the reverberation level and the ratio of echo-reverberation when the receiver is narrow beam.The simulation shows,elliptical model could be used to predict bistatic reverberation strength and analyze characteristics.It is also convenient for the integration of bistatic sonar system and could be used in project.