曲面參數(shù)二次模擬結(jié)合積分奇異降階的矩量法數(shù)值計(jì)算
Numerical calculation of combining surface parametric quadratic modeling with reducing singularity order of integral in moment method
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摘要: 該文研究了曲面參數(shù)二次模擬結(jié)合積分奇異降階的數(shù)值方法,用于矩量法計(jì)算將目標(biāo)體用參數(shù)二次曲面模擬,通過奇異降階法把積分奇異性從O(1/R2)降至O(1/R)。相比其它一些數(shù)值方法,該方法不但簡(jiǎn)化了自阻抗元素的計(jì)算復(fù)雜性,而且增加了計(jì)算的穩(wěn)定性和精確性。該方法計(jì)算了某些目標(biāo)體的雷達(dá)散射截面(RCS)。其結(jié)果與其它方法所得結(jié)果相比較十分一致。
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關(guān)鍵詞:
- 參數(shù)二次曲面; 積分奇異性; RCS
Abstract: In this paper, the numerical method of combining surface parametric quadratic modeling with singularity orders reducing in moment method is analyzed. The objects are modeled by parametric quadratic surface. The singularity order of the integral is reduced from O(1/R2) to O(1/R). Compared with other methods, this method simplifies the complexity of self-impedance elements calculating and increases its calculating stability and accuracy. It is applied to calculating RCS of some objects. Good agreement with the results from some other methods is found. -
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