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一种基于FE-BI的飞机进气道RCS的有效计算方法

Effective method based on FE-BI technique for RCS computation of the jet engine inlet
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摘要 针对飞机进气道RCS的计算,提出了一种基于有限元—边界积分(FE-BI)法的有效计算方法。该方法利用FE-BI法计算进气道散射时矩阵元素及激励向量的特点,基于广义高斯消去法,将进气道沿纵深方向划分为若干层,逐层推进计算。计算所需最大内存仅与进气道的横截面尺寸相关而与进气道的深度无关,计算时间与进气道的长度成正比。数值计算结果表明:在满足剖分及分层要求的前提下,该方法是一种精确的计算方法,且可以使计算效率明显提高。 Aiming at the RCS computation of the jet engine inlet, an effective method based on the finite element-boundary integration (FE-BI) technique is presented. By exploiting the unique features of the matrix elements and excited vectors when FE-BI technique is utilized to compute the jet engine inlet scattering, and introducing the idea of generalized Gaussian elimination, we can divide the inlet into some layers along its depth and perform the calculation layer by layer. The required maximum memory is only dependent on the inlet cross section size and independent of its depth, and the computation time increases linearly with its depth. The numerical results show that the presented method is accurate when the meshing and layer-dividing meet the requirements and it can improve the computational efficiency significantly.
出处 《电波科学学报》 EI CSCD 北大核心 2010年第4期611-616,共6页 Chinese Journal of Radio Science
基金 中央高校基本科研业务费专项资金资助(JY10000902012)
关键词 进气道 RCS 有限元-边界积分(FE—BI) jet engine inlet RCS finite element-boundary integration (FE-BI)
作者简介 联系人:邹艳林(1980~),女,湖北人,西安电子科技大学天线与电磁散射研究所副教授,博士,主要研究方向为电磁学计算方法、天线理论与工程等。E-mail:ylzou@mail.xidian.edu.cn 张红霞(1975-),女,河南人,中国航空工业发展研究中心高级工程师,北京航空航天大学博士生。主要从事飞行器RCS分析计算方面的研究工作。 孙良(1983-),男,河北人,西安电子科技大学天线与电磁散射研究所博士生,主要研究方向为FE—BI混合方法计算腔体电磁散射及天线辐射等。 刘其中(1938-),男,重庆人,西安电子科技大学天线与电磁散射研究所教授、博士生导师。主要研究方向为天线数值计算与CAD、宽带小型化天线和智能天线、电磁散射以及电磁兼容等。
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