席志豪, 梁涛, 谢彦召, 等. 考虑介质层影响的电磁脉冲耦合传输线模型[J]. 中国舰船研究, 2023, 18(4): 28–34. doi: 10.19693/j.issn.1673-3185.02487
引用本文: 席志豪, 梁涛, 谢彦召, 等. 考虑介质层影响的电磁脉冲耦合传输线模型[J]. 中国舰船研究, 2023, 18(4): 28–34. doi: 10.19693/j.issn.1673-3185.02487
XI Z H, LIANG T, XIE Y Z, et al. Pulsed electromagnetic field-transmission cable coupling model considering insulation layer[J]. Chinese Journal of Ship Research, 2023, 18(4): 28–34. doi: 10.19693/j.issn.1673-3185.02487
Citation: XI Z H, LIANG T, XIE Y Z, et al. Pulsed electromagnetic field-transmission cable coupling model considering insulation layer[J]. Chinese Journal of Ship Research, 2023, 18(4): 28–34. doi: 10.19693/j.issn.1673-3185.02487

考虑介质层影响的电磁脉冲耦合传输线模型

Pulsed electromagnetic field-transmission cable coupling model considering insulation layer

  • 摘要:
      目的  Baum-Liu-Tesche(BLT)方程是进行场–线耦合计算的重要方法,在电磁耦合定量分析领域具有广泛应用。经典BLT方程忽略了线缆介质层对入射电场的畸变特性,导致在特定入射、极化方向下的耦合效率计算出现较大误差。
      方法  针对该问题,将频域修正的BLT方法引入时域,研究在高空电磁脉冲(HEMP)激励下单根线缆负载电压和电流响应的计算方法,并通过与全波算法计算结果对比,验证模型的正确性。在此基础上,对修正方法所适用的线缆结构(高度、线径、介质层参数等)、入射电场(入射方向、极化方向)特征进行分析。
      结果  结果显示,在HEMP激励下,以全波仿真结果为基准,经典BLT模型预测响应结果误差可高达一倍以上,而引入介质层修正系数后的BLT模型准确度显著提高。
      结论  该研究验证了BLT修正模型在分析时域场–线耦合问题时的准确性,提出了BLT修正模型的适用性判据,有助于阐明HEMP同实际复杂线缆的相互耦合作用机制。

     

    Abstract:
      Objective  The Baum-Liu-Tesche (BLT) equation is an important calculation method for field-transmission cable coupling which is widely used in the domain of electromagnetic coupling quantitative analysis. The classical BLT equation ignores the distortion effects of the cable's insulation layer on the incident field, leading to large errors in coupling calculation under specific incident and polarization directions.
      Method  In response to this issue, a frequency domain modified BLT method is introduced into the time domain to study the calculation method of the load voltage and current response in a single cable excited by a high altitude electromagnetic pulse (HEMP). The correctness of the model is then verified through a comparison with a full wave algorithm (finite integer technique). On this foundation, the characteristics of the cable structure (height, diameter, insulation parameters, etc.) and incident field (incident direction, polarization direction, etc.) applicable to the modified method are analyzed.
      Results  Under HEMP excitation, based on the full wave simulation results, the prediction error of the classical BLT model can be more than doubled, while the accuracy of the BLT model with the insulation layer coefficient is significantly improved.
      Conclusion  This study verifies the accuracy of the modified BLT model in analyzing the field-transmission cable coupling problem in the time domain, and puts forward the applicability criterion of the modified BLT model which helps to clarify the coupling mechanism between HEMP and actual complex cables.

     

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