一种计算旋转对称目标散射的有限元算法

本文给出了一种混合使用有限元和圆柱完全匹配层计算旋转对称目标散射的有限元算法。使用矢量棱边基函数表示横向场分量,用标量节点基函数表示角度场分量。矢量基函数的使用消除了伪解问题,圆柱坐标完全匹配层(PML)的使用缩减了有限元网格,从而避免了无用的计算。这种方法能够处理大型的实际雷达目标,同时与标准目标的计算结果符合得很好。

Study of scattering from body of revolution using FEM-PML

This paper developed an efficient finite element method (FEM) to compute scattering from a body of revolution (BOR). The method uses edge-based vector basis functions to expand the transverse field components and node-based scalar basis functions to expand the angular component. The use of perfectly matched layer (PML) in cylindrical coordinates avoids the wasted computation. The method is capable of handling large, realistic radar targets, and good agreement with theoretical results is achieved for benchmark targets.