Analysis of Electromagnetic Pulse in Civil Air Defense Engineering Based on TDSBR Algorithm

This paper proposes an algorithm based on the Time-Domain Shooting and Bouncing Rays (TDSBR) method. Firstly, based on the theory of traditional shooting and bouncing rays, the theory is extended from the far field to the near field region, and a method for calculating the near-field field strength of the target using the Frequency-Domain Shooting and Bouncing Rays (FDSBR) is derived. Then, considering the deficiency of FDSBR in analyzing the target’s time-domain response, the algorithm is extended to time-domain analysis and a formula for solving the near field time-domain response of the target using TDSBR is derived. The algorithm is implemented through programming and compared with commercial simulation software, proving its feasibility and efficiency. Finally, the electric field strength at different positions inside the civil air defense project is calculated, and the electromagnetic pulse coupling situation of the entrance door of the civil air defense project under different states is analyzed, providing effective simulation data for electromagnetic protection of civil air defense projects.