有限元/边界积分方法在海面及其上方弹体目标电磁散射中的应用

徐润汶; 郭立新; 范天奇

doi:10.7498/aps.62.170301

摘要

本文将有限元/边界积分方法(FE/BIM)结合区域分解方法引入到粗糙海面及其上方目标的电磁散射问题的研究中. 由于积分边界可以以任意形状设置在距模型表面任意远的距离处, 故本文采用共形人工边界结合区域分解建模方法截断模型的开放计算区域以减少求解未知量, 在截断区域内部采用有限元方法求解, 而计算区域的边界条件通过边界积分方程方法得到. 通过与矩量法获得的数值计算结果进行比较, 证明了该混合算法及模型处理方法的正确性, 进而研究了海面上方弹体目标的电磁散射特性, 并讨论了其双站散射系数随电磁波入射角度、目标高度、海面风速以及弹体尺寸的电磁散射特性变化情况. 本文结果可用于反演复杂背景下的目标信息及目标探测等领域.

关键词:

Abstract

In this work, the finite element/boundary integral method (FE/BIM) combined with the domain decomposition method is introduced to study the electromagnetic scattering from the target above the rough sea surface. As the integral boundary can be set at anywhere with an arbitrary shape, the conformal truncated boundary is built to reduce the unknowns of the computational region combined with the domain decomposition method. In the interior region, the finite element method is used to solve the problem, whereas the artificial boundary condition can be obtained by the boundary integral method. The strategy of hybrid FE/BIM and the modeling method are presented with their validity evaluated by the method of moment, then bistatic scattering properties of a missile above the sea surface are discussed, and their dependence upon different incident angles, target height, wind speed above the sea, and the size of the missile are discussed in detail. The information of targets and the target detection can be retrieved and analyzed by the results in this paper.

Keywords:

作者及机构信息

1.
西安电子科技大学理学院, 西安 710071

基金项目: 国家杰出青年科学基金(批准号: 61225002);高等学校博士学科点专项科研基金(批准号: 20100203110016)和中央高校基本科研业务费(批准号: K50510070001)资助的课题.

Authors and contacts

1.
School of Sciences, Xidian University, Xi’an 710071, China

Funds: Project supported by the National Science Foundation for Distinguished Young Scholars of China (Grant No. 61225002), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20100203110016), and the Fundamental Research Funds for the Central Universities, China (Grant No. K50510070001).

参考文献

[1]	Holliday D 1987 IEEE Trans. Antennas Propagat. 35 120
[2]	Wang R, Guo L X, Qin S T, Wu Z S 2008 Acta Phys. Sin. 57 3473 (in Chinese) [王蕊, 郭立新, 秦三团, 吴振森 2008 物理学报 57 3473]
[3]	Soto-Crespo J M, Nieto-Vesperinas M, Friberg A T 1990 J. Opt. Soc. Am. A 7 1185
[4]	West J C, Ja S J 2002 Radio Science 37 7/1
[5]	Broschat S L 1999 IEEE Trans. Geosci. Remote Sensing 37 632
[6]	Wang X, Li L W 2009 Progress in Electromagnetics Research 91 35
[7]	Wagner R L, Song J M, Chew W C 1997 IEEE Trans. Antennas Propagat. 45 235
[8]	Kubicke G, Bourlier C, Saillard J 2008 Waves in Random and Complex Media 18 495
[9]	Matthys M Botha, David Bruce Davidson 2006 IEEE Trans. Antennas Propagat. 54 3499
[10]	Ozlem Ozgun 2012 IEEE Trans. Geosci. Remote Sensing 50 769
[11]	Li J, Guo L X, He Q, Wei B 2011 Chin. Phys. Lett. 28 10401
[12]	Zhang M, Bai L, Zhou P 2010 Chin. Phys. Lett. 27 014101
[13]	Thorsos E I 1988 J. Acoust. Soc. Am. 83 78

施引文献

[1]	Holliday D 1987 IEEE Trans. Antennas Propagat. 35 120
[2]	Wang R, Guo L X, Qin S T, Wu Z S 2008 Acta Phys. Sin. 57 3473 (in Chinese) [王蕊, 郭立新, 秦三团, 吴振森 2008 物理学报 57 3473]
[3]	Soto-Crespo J M, Nieto-Vesperinas M, Friberg A T 1990 J. Opt. Soc. Am. A 7 1185
[4]	West J C, Ja S J 2002 Radio Science 37 7/1
[5]	Broschat S L 1999 IEEE Trans. Geosci. Remote Sensing 37 632
[6]	Wang X, Li L W 2009 Progress in Electromagnetics Research 91 35
[7]	Wagner R L, Song J M, Chew W C 1997 IEEE Trans. Antennas Propagat. 45 235
[8]	Kubicke G, Bourlier C, Saillard J 2008 Waves in Random and Complex Media 18 495
[9]	Matthys M Botha, David Bruce Davidson 2006 IEEE Trans. Antennas Propagat. 54 3499
[10]	Ozlem Ozgun 2012 IEEE Trans. Geosci. Remote Sensing 50 769
[11]	Li J, Guo L X, He Q, Wei B 2011 Chin. Phys. Lett. 28 10401
[12]	Zhang M, Bai L, Zhou P 2010 Chin. Phys. Lett. 27 014101
[13]	Thorsos E I 1988 J. Acoust. Soc. Am. 83 78

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