曲面参数二次模拟结合积分奇异降阶的矩量法数值计算
Numerical calculation of combining surface parametric quadratic modeling with reducing singularity order of integral in moment method
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摘要: 该文研究了曲面参数二次模拟结合积分奇异降阶的数值方法,用于矩量法计算将目标体用参数二次曲面模拟,通过奇异降阶法把积分奇异性从O(1/R2)降至O(1/R)。相比其它一些数值方法,该方法不但简化了自阻抗元素的计算复杂性,而且增加了计算的稳定性和精确性。该方法计算了某些目标体的雷达散射截面(RCS)。其结果与其它方法所得结果相比较十分一致。
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关键词:
- 参数二次曲面; 积分奇异性; 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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