多天线-散射体结构矩量法分析的自动网格划分方法

Automatic Mesh Partition Based on MOM for Antenna and Scatter Body Structure

针对多天线-散射体(散射体可看作是由三角形面和四边形平面围成的几何体)结构,提出了一种基于矩量法的散射面自动网格划分方法。该方法通过三次网格划分得到符合矩量法分析要求的三角形面元、四边形面元。首先对散射体各表面按无天线连接并遵循面积条件进行递归二分,得到符合面积要求的面元,这就是第1次网格划分;接着分4种情况对连接有天线的有关面元进行再一次划分,得到线面结合点在中心的正方形面元以及若干三角形、四边形面元,这就是第2次网格划分;最后对狭长的面元进行第3次网格划分,得到质量较好的面元。多项工程应用表明,该网格划分方法稳定、可靠、速度快、适应性强。

Wire antenna and scatter body structure with faceted triangle and quadrangle surfaces are taken into consideration. An approach consisting of three steps is presented. The first step is to partition all surfaces of the scatter body by recursively bisecting each triangle and quadrangle to get the required sizes of all elements, neglecting the presence of antennas. The second step is to partition the elements that are connected with the wire antenna into smaller areas. The third step is to partition the narrow elements to improve their shap quality. Engineering applications show that this algorithm is stable, reliable, fast and applicable widely.