CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2020, Vol. 37 ›› Issue (1): 97-106.DOI: 10.19596/j.cnki.1001-246x.7981

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Fast Simulation of Radiation Near-fields of Large Vertically Polarized EMP Radiating-wave Simulator

ZHU Xiangqin, WU Wei, JIA Wei, CAI Libing   

  1. State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, Shanxi 710024, China
  • Received:2018-10-10 Revised:2018-11-13 Online:2020-01-25 Published:2020-01-25

Abstract: A hybrid parallel technology on message-passing interface (MPI) platform in axisymmetric cylindrical coordinates, combining parallel finite-difference time-domain(FDTD) method and near- to near-field transformation with Kirchhoff surface integral representation(KSIR), is presented for fast computing radiation fields of large vertically polarized EMP radiating-wave simulator. Transient response of electric field at testing points as the simulator excited by double exponential function is given. Calculation results are consistent with those by software and parallel FDTD method, while the computing time is saved about 80%. Speedup factor and efficiency of hybrid parallel technology are measured. The hybrid method has advantages of saving computing time and CPU storage especially for larger simulators. Radiation far-fields besides near-fields in time-domain of simulator can be obtained as well.

Key words: message-passing interface, Kirchhoff surface integral representation, near- to near-field transformation, electromagnetic pulse, radiating-wave simulator

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