A fast simulation modeling method based on ACA-MLFMA accelerated domain decomposition non-conformal mesh

Abstract

ACA based-MLFMA-accelerated fast simulation modeling method for domain decomposition non-conformal mesh comprises the following steps: S1, according to the structure and material characteristics of the target, the target is divided into regions, and discretizing then the mesh on each different region, and separately dividing the mesh between adjacent regions to form non-conformal mesh; S2, separating the mesh between adjacent regions to form non-conformal mesh; S2, selecting appropriate basis function to simulate local electromagnetic current, and using integral equation operator to form matrix equation; S3, using ACA-MFLMA algorithm compresses the matrix equation and iterates quickly to accelerate the solution of the matrix equation, obtains the position induction coefficients of the local electromagnetic current, and then obtains the distribution of the induced electromagnetic current on the target. S4, taking the induced electromagnetic current as the secondary radiation source, theelectromagnetic field distribution in the near region and the scattering characteristics of the far field are calculated, and the electromagnetic field response characteristics of the target are analyzed. The advantages of the method are that it makes full use of the advantages of ACA and MLFMA, and greatly improves the capability of solving the engineering electromagnetic field characteristics.

Description

technical field [0001] The invention relates to an efficient and fast algorithm for the electromagnetic characteristics of an electrically large-sized and complex target, in particular to a fast simulation modeling method based on ACA-MLFMA accelerated regional decomposition of non-conformal grids. Background technique [0002] With the development of computer technology, the numerical algorithms provided by computational electromagnetics have been more and more widely used. Using the numerical algorithms provided by computational electromagnetics, the relevant electromagnetic targets can be modeled, simulated and optimized on the computer, which greatly shortens the The development cycle of electronic products is shortened, thereby reducing the cost of research and development. [0003] The emergence of composite materials, multi-scale structures, large electrical dimensions and other characteristics make conventional electromagnetic characteristic analysis methods unable t...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a fast simulation modeling method based on ACA-MLFMA accelerated domain decomposition non-conformal grid, under the framework of domain decomposition, using adaptive cross approximation algorithm and multi-layer fast multipole (ACA- MLFMA) combined with the acceleration of the integral equation method of moments can greatly improve the ability to solve complex metal / complex composite objects, and solve the problem of slow solution speed and high internal friction consumption in the prior art that the domain decomposition cannot meet the characteristics of large-scale electromagnetic fields. , to provide technical means and data support for the analysis of electromagnetic field characteristics of electric large-scale complex structure medium / metal composite targets

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