基于时域不连续伽辽金算法的时域屏蔽效能分析

贾正朗; 刘欣怡; 张欢欢; 吴为军; 陶理

doi:10.19693/j.issn.1673-3185.03140

基于时域不连续伽辽金算法的时域屏蔽效能分析

Time-domain shielding effectiveness analysis based on DGTD method

摘要

摘要:
目的为精确分析金属屏蔽腔的时域屏蔽效能，提出一种基于局部时间步进技术和并行技术的时域不连续伽辽金（DGTD）算法。
方法利用DGTD算法，对金属屏蔽腔进行全波电磁仿真，进而计算时域屏蔽效能（TDSE）；利用局部时间步进（LTS）技术增大时间步长，然后结合并行技术显著缩短计算时间；分析金属屏蔽腔的孔径尺寸、腔体厚度、阵列孔间距等设计参数对时域屏蔽效能的影响。
结果数值算例结果显示，所提方法正确、有效。
结论所提方法为电磁屏蔽问题的仿真提供了一种有效的工具，对金属屏蔽腔的设计具有一定的指导意义。

Abstract:
Objective In order to accurately analyze the time-domain shielding effectiveness (TDSE) of metallic enclosures, a discontinuous Galerkin time domain (DGTD) method based on the local time-stepping (LTS) technique and parallel technique is proposed.
Methods The full wave electromagnetic simulation of metallic enclosures is carried out by the DGTD method, and the TDSE is then calculated. LTS technology is used to increase the time step size, combined with parallel technology to greatly shorten the computing time. The influence of design parameters such as aperture size, enclosure thickness and array hole spacing on TDSE is then analyzed.
Results The numerical results show that the proposed method is correct and effective.
Conclusion The proposed method provides an effective tool for the simulation of electromagnetic shielding problems, and has certain guiding significance for the design of metallic enclosures.

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