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典型电磁计算方法包括三类:高频渐近方法、微分方程法和积分方程法,其代表性方法是物理光学法、有限元法和矩量法。借助IEEE电磁兼容协会在2011年发布的1597.2标准中所提出的特征选择验证方法,对应用上述三种方法获得的两种频率上缩小尺寸的布拉莫斯导弹模型雷达散射截面的计算结果进行了差异分析。分析结果显示,物理光学法和矩量法之间的结果相似性稍差,尤其是在较低频率上;而有限元法和矩量法之间的结果具有非常好的相似性,且这种相似性几乎不随频率变化而改变。
Typical electromagnetic calculation methods include three categories: high-frequency asymptotic method, differential equation method and integral equation method, the representative methods are physical optics, finite element method and the method of moments. Based on the feature selection verification method proposed by IEEE Electromagnetic Compatibility Association (IEMA) in the 1597.2 standard issued in 2011, the calculation results of the radar cross section of the two reduced-size BrahMos missile models obtained by using the above three methods Difference analysis. The analysis shows that the results between the physical optical method and the moment method are somewhat less similar, especially at lower frequencies, and the results between the finite element method and the moment method have very good similarities, and this Similarity hardly changes with frequency.