Method for calculating frequency domain electromagnetic field based on implicit FVFD

An electromagnetic field and frequency domain technology, applied in the field of frequency domain numerical solution of electromagnetics, can solve problems such as imperfect frequency domain micro-classification algorithm, maintain accuracy and algorithm design, reduce Fourier transform links, improve computational efficiency and The effect of precision

Active Publication Date: 2021-07-23
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

On the one hand, the field calculation micro-classification method has unique advantages and engineering requirements in simulating complex det

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  • Method for calculating frequency domain electromagnetic field based on implicit FVFD
  • Method for calculating frequency domain electromagnetic field based on implicit FVFD
  • Method for calculating frequency domain electromagnetic field based on implicit FVFD

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Embodiment Construction

[0061] refer to Figure 1 to Figure 7 An embodiment of a method for calculating frequency-domain electromagnetic fields based on implicit FVFD in the present invention is further described.

[0062] Refer to attached figure 1, the entire frequency-domain finite volume method calculation electromagnetic field software can be divided into three parts according to the structure: preprocessing, electromagnetic field calculation and postprocessing. Preprocessing mainly includes three modules: grid data input, calculation parameter data input, and control parameter input, which are mainly used to read grid data, calculation parameter data input, and control parameter files, and on this basis, perform preprocessing for The electromagnetic field calculation provides calculation support; the electromagnetic field calculation includes: space electromagnetic field MUSCL format interpolation, element interface flux calculation, time advancement, and convergence judgment modules; post-pro...

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Abstract

The invention provides a method for calculating a frequency domain electromagnetic field based on implicit FVFD, and the method comprises the steps of carrying out simulation modeling according to the physical background of an electromagnetic problem simulated by a target in combination with boundary condition information; encrypting quadrilateral or hexahedral structure grids of the numerical calculation area at wall surfaces and geometric singular positions, wherein the grids are gradually far away from scattering wall surfaces and are gradually sparse; outputting a grid data file and setting and outputting a boundary condition file; inputting target calculation electromagnetic parameters and numerical calculation control parameters; inputting grid data and a boundary condition information file, and initializing a calculation space electromagnetic field; carrying out iterative solution on the frequency domain electromagnetic field of the Maxwell equation set; and outputting real part and imaginary part spatial distribution of the electromagnetic field, and outputting surface induced current and radar cross section spatial distribution data. According to the invention, the problem of large-scale electromagnetic scattering of any complex-shape and high-frequency electrically large-size target can be solved.

Description

technical field [0001] The present invention relates to the technical field of frequency-domain numerical solution of electromagnetics, in particular to a method for calculating frequency-domain electromagnetic fields based on implicit FVFD (Finite Volume Frequency Domain, FVFD). Background technique [0002] The electromagnetic scattering of targets with complex shapes and electromagnetic interference in complex electromagnetic environments require the calculation of the spatial distribution of electromagnetic fields. Electromagnetic fields satisfy Maxwell's equations. With the development of computer technology, it is possible to directly solve the equations. The same hyperbolic mathematical characteristics as the Euler equation promote the application of computational fluid dynamics (Computational Fluid Dynamics, CFD) technology in electromagnetic field calculations, among which the finite difference time domain (FDTD) and finite volume method in time domain (Finite Volum...

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Application Information

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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 许勇江雄牟斌
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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