计算物理 ›› 2005, Vol. 22 ›› Issue (1): 65-69.

• 研究论文 • 上一篇    下一篇

用二维时域有限差分法计算机翼雷达散射截面

薛晓春, 王雪华   

  1. 北京航空航天大学航空科学与工程学院, 北京 100083
  • 收稿日期:2003-09-30 修回日期:2004-01-05 出版日期:2005-01-25 发布日期:2005-01-25
  • 作者简介:薛晓春(1962-),男,北京,副教授,博士,从事隐身方面的研究.

Radar Cross Sections of Airplane Wings in the 2D FDTD Method

XUE Xiao-chun, WANG Xue-hua   

  1. Beijing University of Aeronautics and Astronautics, Academy of Aeronautic Science and Engineering, Beijing 100083, China
  • Received:2003-09-30 Revised:2004-01-05 Online:2005-01-25 Published:2005-01-25

摘要: 应用二维时域有限差分(FDTD)程序计算二维翼型NACA0012和金属方柱的双站雷达散射截面,与国内外文献上的结果进行比较,证明该程序的有效性.而后计算二维不同形状机翼的双站雷达散射截面(RCS)和不同后掠角时后掠翼和三角翼的双站RCS,得出不同形状机翼有不同的RCS分布;改变后掠角的大小可以改变机翼的RCS分布.因此,根据设计要求,可以通过选用不同机翼形状或不同大小的后掠角,使飞行器达到RCS减缩.

关键词: 电磁散射, 雷达散射截面减缩, 时域有限差分法, 机翼, 整形

Abstract: Bistatic radar cross sections (RCS) of NACA0012 and a square-pole of metal are computed with 2D FDTD program. Numerical results are consistent with those of literature available. Hence the 2D FDTD program is shown correct and effective. Calculations are performed for the bistatic RCS of 2D wings, sweepback-wings and triangle-wings. These results show that wings with different figure have different profiles of RCS and varying angle χ causes the change of sweepback-wing' and triangle-wing's RCS. The requirement of reducing RCS could be reached through choosing different figure of wing or varying χ according to the design demand.

Key words: electromagnetic scattering, radar cross section reduce, finite-difference time-domain (FDTD) method, wing, figure varying

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