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基于CP-FDTD的复杂细缝屏蔽效能分析方法

刘强 徐勇 孟雪松 郑宇腾 闫丽萍 周海京

刘强, 徐勇, 孟雪松, 等. 基于CP-FDTD的复杂细缝屏蔽效能分析方法[J]. 强激光与粒子束, 2019, 31: 103209. doi: 10.11884/HPLPB201931.190168
引用本文: 刘强, 徐勇, 孟雪松, 等. 基于CP-FDTD的复杂细缝屏蔽效能分析方法[J]. 强激光与粒子束, 2019, 31: 103209. doi: 10.11884/HPLPB201931.190168
Liu Qiang, Xu Yong, Meng Xuesong, et al. Method of analyzing shielding effectiveness of complex thin slots based on CP-FDTD[J]. High Power Laser and Particle Beams, 2019, 31: 103209. doi: 10.11884/HPLPB201931.190168
Citation: Liu Qiang, Xu Yong, Meng Xuesong, et al. Method of analyzing shielding effectiveness of complex thin slots based on CP-FDTD[J]. High Power Laser and Particle Beams, 2019, 31: 103209. doi: 10.11884/HPLPB201931.190168

基于CP-FDTD的复杂细缝屏蔽效能分析方法

doi: 10.11884/HPLPB201931.190168
基金项目: 

国家自然科学基金项目 61771061

详细信息
    作者简介:

    刘强(1980—), 男,硕士,助理研究员,从事电磁环境效应数值模拟、强电磁脉冲防护设计、统计电磁学方面的研究; q_liu1987@126.com

  • 中图分类号: O441.4

Method of analyzing shielding effectiveness of complex thin slots based on CP-FDTD

  • 摘要: 围绕强电磁脉冲的细缝“后门”耦合问题,介绍了基于CP-FDTD的细缝屏蔽效能分析高效数值模拟方法。在证明CP-FDTD准确性的基础上,从入射电磁场极化方向、入射角度和计算效率三个方面进行了详细分析,验证了CP-FDTD在处理工程复杂细缝电磁脉冲耦合时的适用性。通过将CP-FDTD算法集成于自主研发软件JEMS-FDTD,形成可以高效分析工程复杂细缝屏蔽效能的数值模拟方法,并应用于工程部件细缝结构的屏蔽效能分析。
  • 图  1  测试计算模型与环形缝区域Yee氏网格剖分示意图

    Figure  1.  Calculation model and diagram of Yee's gridding

    图  2  电场探针观察点位置示意图

    Figure  2.  Diagram of E-probes distribution

    图  3  入射电磁场的极化角度示意图

    Figure  3.  Diagram of polarized angle of incident electromagnetic field

    图  4  CP-FDTD和fine-FDTD单个电场分量的SE

    Figure  4.  Comparison of SE to Ex, Ey and Ez

    图  5  入射电磁场的入射角度示意图

    Figure  5.  Diagram of incident angle of electromagnetic field

    图  6  CP-FDTD计算效率测试模型

    Figure  6.  Simulation model for CP-FDTD calculation efficiency

    图  7  前挡玻璃窗边框及其细缝结构

    Figure  7.  Structure of window with nested slot

    图  8  前挡玻璃窗边框嵌套缝网格剖分示意图

    Figure  8.  Diagram of subgridding of window with nested slot

    图  9  CP-FDTD计算结果

    Figure  9.  CP-FDTD calculation results

    表  1  MAV和ρ随极化角α的变化

    Table  1.   Variation of MAV and ρ along with α

    α/(°) MAV/dB ρ
    P1 P2 P3 P1 P2 P3
    90 0.915 4 1.165 0 1.616 0 0.989 3 0.986 0 0.976 2
    60 0.640 3 0.934 2 1.300 0 0.995 5 0.991 4 0.984 0
    30 0.664 8 0.851 4 1.102 0 0.995 6 0.993 9 0.985 5
    0 1.364 0 1.220 0 1.694 0 0.994 9 0.997 9 0.989 1
    下载: 导出CSV

    表  2  观察点P1处MAV和ρ随入射角度的变化

    Table  2.   Variation of MAV and ρ along with incident angle at P1

    θ/(°) MAV/dB ρ
    φ=90 φ=60 φ=30 φ=90 φ=60 φ=30
    90 0.915 4 1.038 0 1.567 0 0.989 3 0.988 4 0.969 8
    60 0.753 5 0.582 9 0.665 8 0.995 1 0.996 9 0.995 3
    30 0.884 5 0.673 6 0.660 6 0.994 3 0.996 6 0.995 3
    下载: 导出CSV

    表  3  观察点P2处MAV和ρ随入射角度的变化

    Table  3.   Variation of MAV and ρ along with incident angle at P2

    θ/(°) MAV/dB ρ
    φ=90 φ=60 φ=30 φ=90 φ=60 φ=30
    90 1.165 0 1.304 0 1.108 0 0.986 0 0.984 2 0.983 8
    60 0.969 7 0.621 5 0.692 3 0.991 3 0.997 3 0.996 5
    30 0.980 1 0.696 0 0.708 9 0.992 0 0.997 0 0.996 2
    下载: 导出CSV

    表  4  观察点P3处MAV和ρ随入射角度的变化

    Table  4.   Variation of MAV and ρ along with incident angle at P3

    θ/(°) MAV/dB ρ
    φ=90 φ=60 φ=30 φ=90 φ=60 φ=30
    90 1.616 0 1.591 0 1.460 0 0.976 2 0.976 4 0.975 4
    60 1.140 0 1.038 0 0.937 4 0.979 5 0.978 6 0.985 1
    30 1.204 0 1.031 0 0.994 3 0.994 5 0.980 3 0.979 6
    下载: 导出CSV

    表  5  Fine-FDTD与CP-FDTD计算效率对比

    Table  5.   Comparison of calculation efficiency between fine-FDTD and CP-FDTD

    model method number time/min
    horizontal slot fine-FDTD 337.49 303.03
    CP-FDTD 111.87 94.11
    circular slot fine-FDTD 764.71 1 630.43
    CP-FDTD 111.87 95.23
    complex slots fine-FDTD 764.71 1 666.67
    CP-FDTD 111.87 98.46
    下载: 导出CSV
  • [1] 张亚普, 达新宇, 谢铁成. 孔缝箱体屏蔽效能电磁拓扑分析模型[J]. 强激光与粒子束, 2014, 26: 023204. doi: 10.3788/HPLPB201426.023204

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    Kan Yong, Yan Liping, Zhao Xiang, et al. Electromagnetic topology based fast algorithm for shielding effectiveness estimation of multiple enclosures with apertures. Acta Physica Sinica, 2016, 65: 030702 https://www.cnki.com.cn/Article/CJFDTOTAL-WLXB201603011.htm
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    Chen Xi, Fu Jiwei, Wu Qiang. Evaluation method for shielding effectiveness of cabins in complex transportable systems. High Power Laser and Particle Beams, 2016, 28: 113203 doi: 10.11884/HPLPB201628.160116
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  • 被引次数: 0
出版历程
  • 收稿日期:  2019-05-16
  • 修回日期:  2019-06-04
  • 刊出日期:  2019-10-15

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