Research on Electromagnetic Scattering Characteristics of Kelvin Wake of Ship Based on MPI

摘要

An parallel small slope approximation acceleration algorithm based on MPI is improved to calculate the electromagnetic scattering of the ship's wake on the sea surface in this paper. The parallel algorithm calculates the backscattering coefficient at different angles by starting multiple processes, and can solve the electrical large scale electromagnetic scattering problem. The Kelvin wake model of the ship is established by the point source perturbation method. The Elfouhaily spectrum is adopted to construct the rough sea surface. Then the parallel small slope approximation method is used to calculate the electromagnetic scattering of the Kelvin wake produced by the ship. The electromagnetic scattering results were compared with those of pure sea surface. In addition, the effect of different wind speeds and different ship speeds on the electromagnetic scattering characteristics of the ship's Kelvin wake are also discussed. The acceleration ratio of different frequencies and different numbers of samples were calculated to further verify the effectiveness of the parallel algorithm.