Chinese Journal of Computational Physics ›› 2024, Vol. 41 ›› Issue (5): 589-595.DOI: 10.19596/j.cnki.1001-246x.8857

• Special Column on the National Conference on Computational Physics • Previous Articles     Next Articles

Study on HEMP Environment of Ground Based on G-TF/SF Technique

Chao YANG(), Haiyan XIE, Xinyang ZHAI, Hailiang QIAO, Zaigao CHEN, Yinjun GAO   

  1. National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024, China
  • Received:2023-10-30 Online:2024-09-25 Published:2024-09-14

Abstract:

For the finite-difference time-domain (FDTD) solution of the half-space problem, the conventional total-field/scattered-field (TF/SF) technique cannot be directly applied to introduce excitation fields for electromagnetic scattering from the ground. In this paper, we extend the generalized total-field/scattered-field (G-TF/SF) method to accurately calculate the high altitude electromagnetic pulse (HEMP) environment in 3D ground scenarios and adopt the convolution perfectly matched layer (CPML) absorption boundary condition around it. The G-TF/SF method effectively eliminates edge effects in numerical calculations for finite ground, thereby improving accuracy in the calculation of the ground electromagnetic environment. Moreover, only the incident field needs to be introduced at the G-TF/SF boundary, avoiding the computation of reflected and transmitted fields.

Key words: finite-difference time-domain, generalized total-field/scattered-field, high altitude electromagnetic pulse environment, ground

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