项目名称: 临近空间高超声速目标宽带电磁特性研究
项目编号: No.61271076
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 无线电电子学、电信技术
项目作者: 陈如山
作者单位: 南京理工大学
项目金额: 90万元
中文摘要: 针对电大尺寸临近空间高超声速目标,开展流场与电磁分析网格耦合参数自适应建模研究,采用多层快速多极子技术加速体面积分方程方法,采用相位基函数以及快速远场近似技术缓解内存需求。开展体/面积分方程的高效预条件技术的研究,提高迭代算法的收敛速度,实现对临近空间高超声速目标宽带电磁特性的快速分析。开展基于曲四面体进行空间离散的无条件稳定的时域谱元法临近空间高超声速目标宽频带时域电磁特性的快速分析。开展等离子体色散媒质的时域谱元法分析技术的研究,针对临近空间高超声速目标多尺度电大尺寸特性,开展区域分解技术结合时域谱元法实现目标时域电磁特性的高效并行分析研究。
中文关键词: 临近空间;电磁散射;共形时域有限差分方法;时域谱元法;体面积分方程方法
英文摘要: Adaptive modeling of mesh coupled parameters of flow and electromagnetic fields is investigated for electronicly large target in near space. The volume-surface integral method is speeded up by multilevel multipole methods and the memory requirement is reduced by using linear-phase basis function and fast far field approximation technique. The preconditioning technique is developed for the volume-surface integral method and the convergence is accelerated for wideband analysis of electromagnetic scattering for electronicly large target in near space. The unconditionally stable time domain spectral method based on tetrahedron mesh is taken to analyze electromagnetic scattering for hypersonic/supersonic target in near space. The time domain spectral method is studied for lossy plasma medium. Domain decomposition technique combined with the time domain spectral method is studied for time domain electromagnetic scattering for hypersonic/supersonic target in near space.
英文关键词: Near Space;Electromagnetic Scattering;Conformal finite difference time domain method;Spectral element time domain method;Volume-surface integral equatino method