大区域复杂环境的电磁建模及快速算法研究

项目名称： 大区域复杂环境的电磁建模及快速算法研究

项目编号： No.U1330109

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 廖成

作者单位： 西南交通大学

项目金额： 82万元

中文摘要： 大区域复杂环境中存在着数量繁多、动态交叠的多种电磁信号，它与周围地理及气象环境综合作用，将对设备和人员等目标产生重要影响。大区域复杂环境的电磁建模及快速算法研究有助于深入分析其中的电波传播规律，具有重要的科学价值和应用前景。目前的研究还处于起步阶段，如何充分反映电磁波与周围环境的相互作用，以及如何实现计算精度与计算速度的良好均衡，是当前发展的主要瓶颈。本项目拟从大区域复杂环境的构成要素和作用机理出发，以抛物方程方法为核心，研究与之相适应的地理及气象环境的电磁建模技术、高效数值解法和大规模并行技术，探索抛物方程方法对电磁脉冲与超宽角求解问题的处理方法，并结合新型时空分离亚网格时域有限差分法，研究算法间的无缝连接技术，构建满足实际精度要求的包含多变地理、气象环境及多类型辐射源的大区域复杂环境电磁模型。最后，形成高效、高置信度的大规模并行仿真程序，快速准确计算大区域复杂环境中电磁场的时空分布。

中文关键词： 复杂环境；电磁建模；电波传播；抛物方程；分步傅里叶解法

英文摘要： The large area complex environment, in which the numerous electromagnetic signals interact with the surrounding geography and weather factors, can make important impacts on the equipment and personnel. The researches on electromagnetic modeling and efficient algorithms for the large area complex environment are useful in the in-depth analysis of its radiowave propagation law. It has important scientific value and application prospects. However, its current study is still in the initial stage. The development is mainly limited to the issues that how to fully consider the interaction between the electromagnetic wave and its surrounding environment, and how to achieve a good balance between calculation accuracy and speed. In this study, the key components in the large area complex environment will be analyzed and the electromagnetic modeling technology for various geographies and weathers based on parabolic equation will be developed. We will study the efficient numerical solution of the parabolic equation method and its massively parallel technology. We will also explore the techniques of the parabolic equation method in dealing with the electromagnetic pulse problem and the ultra wide angle problem. The finite difference time domain method with sub-grid of the separated time and space will be utilized to deal wit

英文关键词： Complex Environment；Electromagnetic Modeling；Radiowave Propagation；Parabolic Equation；Split-Step Fourier Transform