超低空目标与海面复合散射机理及验证方法研究

The relationship between the geometric shape of sea surface waveform and the electromagnetic scattering data is established based on the data simultaneously collected from the only available large-scale wave-generating tank used for electromagnetic scattering characteristics research in China. The numerical simulations of composite scattering and imaging are carried out on the high-performance computing platform in order to reveal the formation conditions and the scattering mechanism of composite scattering characteristics of the sea surface and targets. Furthemore the numerical modelling methods for simulating roll waves, crushing waves and other types of waves are studied, in order to alleviate the difficulty of simulation of high sea conditions and unknown scattering mechanism. A scientific research system which combines the theoretical analysis and measurement verification is formed. The outcomes of the proposed project can be used as standard data for algorithm verification by reseachers in the relevant fields. And also useful for enhancing the confidence about the accuracy of theoretical modelling from the top level disigner. The proposed project can promote the theoretical modelling and computational simulation thus advance their applications in the engineering desgin. Last but not least, the outcomes of the proposed project can be applied directly to the design and development of the maritime weapon platform.

借助于目前国内唯一专用于电磁散射特性研究的大型造波水池试验设施，通过同步采集天线照射区域海面数字化波形与电磁散射数据，建立海面几何波形与散射特性数据的对应关系；同时针对测量数据，利用高性能计算平台开展复合散射的成像数值仿真分析，揭示海面与目标复合散射增强现象形成的主要条件和散射机理；并研究卷浪、破碎浪等模拟生成方法，解决高海情海况难以模拟与散射机理不明等问题。通过本申请项目的研究，将形成理论分析和测试验证相结合的较完备的超低空目标复合散射科学研究条件，为国内从事相关理论建模研究的专家学者们获取用于理论建模研究所必须的模型校验数据提供便利，消除型号研制总体单位对理论建模精度的质疑，促进理论建模研究工作的进展及其在工程研制中的应用，进而为我国相关海上作战武器系统的研制提供技术支持和理论支撑。

针对强杂波背景下掠海飞行目标的电磁散射特性数据收集及其散射机理分析的迫切需求，利用实验室内造波水池生成满足试验需求的可控二维模拟海面，同步采集天线照射区域海面几何波形与海面电磁散射数据，建立海面几何波形与散射特性数据的对应关系，将海面散射特性的研究由统计性向确定性发展。项目重点研究了高海情海面结构的增强机制、掠海飞行目标与复杂海面间的多次散射增强机理，与国内从事该领域理论建模课题组的合作，为相关的电磁散射模型提供校验数据，为新的散射理论模型的研究提供基础数据