A computationally efficient hybrid FDTD method for solving field-to-wire coupling problems in shielded cables with junctions inside electrically large objects

2022 International Symposium on Electromagnetic Compatibility – EMC Europe Pub Date : 2022-09-05 DOI:10.1109/EMCEurope51680.2022.9900987

Xuesong Meng, Xianfeng Bao, Zhenguo Zhao

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引用次数: 1

Abstract

A computationally efficient hybrid Finite Difference Time Domain (FDTD) method is proposed in the paper to solve field-to-wire coupling problems in multi-conductor shielded cables with junctions inside electrically large objects. In the method, shielded cables illuminated by electromagnetic fields are represented by the external and internal transmission line models. The two models are coupled by a transfer impedance due to the shielding conductive layer. Furthermore, shielded cables' junctions are specially handled by applying three theorems in both external and internal transmission line models. Moreover, the transmission line models are then integrated into an in-house 3D FDTD solver, JEMS-FDTD, to efficiently model shielded cables with junctions inside electrically large objects. In the end, the proposed hybrid method is validated by assessing the induced effects of a three-conductor shielded cable with junctions inside a vehicle when the illumination is a plane wave excited by a strong Electromagnetic Pulse (EMP) and comparing the results with those obtained from the commercial software.

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一种计算效率高的混合时域有限差分(FDTD)方法，用于求解具有电大物体内部结的屏蔽电缆场线耦合问题

本文提出了一种计算效率高的混合时域有限差分(FDTD)方法，用于求解大型电物体内结的多导体屏蔽电缆的场线耦合问题。在该方法中，电磁场照射下的屏蔽电缆用内外传输线模型表示。由于屏蔽导电层，两个模型通过传递阻抗耦合。此外，在外部和内部传输线模型中，通过应用三个定理对屏蔽电缆的连接处进行了特殊处理。此外，传输线模型然后集成到内部的3D FDTD求解器JEMS-FDTD中，以有效地模拟具有电大型物体内部结的屏蔽电缆。最后，通过评估车辆内部三导体屏蔽电缆在强电磁脉冲(EMP)激发的平面波照明下的感应效应，并将结果与商业软件的结果进行比较，验证了所提出的混合方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 International Symposium on Electromagnetic Compatibility – EMC Europe

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