FDTD Evaluation of LEMP Considering the Lossy Dispersive Ground.

Authors

  • Zheng Sun National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering PLA Army Engineering University, Nanjing, 210007, China
  • Lihua Shi National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering PLA Army Engineering University, Nanjing, 210007, China
  • Yinghui Zhou National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering PLA Army Engineering University, Nanjing, 210007, China
  • Bo Yang National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering PLA Army Engineering University, Nanjing, 210007, China
  • Wenwen Jiang National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering PLA Army Engineering University, Nanjing, 210007, China

Keywords:

Dispersive soil, FDTD, LEMP, SARC, vector-fitting

Abstract

An accurate evaluation of lightning electromagnetic pulse (LEMP) using the finite-difference time-domain (FDTD) method in 2-D cylindrical coordinates is studied, which takes the soil dispersion into account. The parameters of engineering soil models are reformed by the vector-fitting (VF) scheme, for an efficient handling in FDTD. The FDTD updating equations for the dispersive soil are developed with the semi-analytical recursive convolution (SARC) algorithm. The cylindrical CPML is also developed for truncating the dispersive soil. The efficiency of the proposed method is validated by comparing the numerical results with the Cooray-Rubinstein (CR) approximation. The proposed method provides an accurate FDTD evaluation of LEMP considering the soil dispersion and can be further incorporated into the simulations of more complicated LEMP problems.

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References

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Published

2021-07-27

How to Cite

[1]
Zheng Sun, Lihua Shi, Yinghui Zhou, Bo Yang, and Wenwen Jiang, “FDTD Evaluation of LEMP Considering the Lossy Dispersive Ground”., ACES Journal, vol. 33, no. 01, pp. 7–14, Jul. 2021.

Issue

2018: Vol 33 Iss 1

Section

Articles