An electromagnetic multi-scale calculation method based on a hybrid grid and a time step length

Abstract

The invention belongs to the field of time domain calculation electromagnetism, and relates to an electromagnetism multi-scale calculation method based on a hybrid grid and a time step length. According to the method, a multi-scale time domain electromagnetic problem is decomposed into a macro scale part and a micro scale part, scale separation is achieved, the solving scale of an original problemis effectively reduced, a mixed grid suitable for the characteristics of a micro unit is adopted in the micro unit for discretization, and the solving freedom degree of the micro unit is further reduced. And in the aspect of time iteration, independent time step lengths are adopted for different microcosmic units for time discretization, so that the defect of too many times of time iteration caused by too small local microgrid size is effectively avoided. After the microscopic information is solved through the microscopic problem, coupling between the macroscopic problem and the microscopic problem is achieved, the macroscopic problem is substituted into the macroscopic problem, iteration solving is conducted through the macroscopic time step length, and finally the technical effect of efficiently solving the multi-scale time domain electromagnetic problem is achieved.

Description

Technical field [0001] The invention belongs to the field of time-domain computational electromagnetics, and relates to an electromagnetic multi-scale calculation method based on a hybrid grid and a time step. Background technique [0002] On the modern battlefield, military aircraft, ships, tanks and other armed equipment carry a large number of electronic weapons. Some of these weapons can detect local military conditions, and some can emit high-power electronic pulses for electronic countermeasures. Therefore, there are complex electromagnetic phenomena such as very complicated electromagnetic interference and high-frequency pulses in a certain battlefield space. Information-based armed equipment is very sensitive to complex electromagnetic environments. In order to ensure that these equipment can still perform their functions in the complex electromagnetic environment of the battlefield, it is necessary to fully simulate the complex multi-scale electromagnetic environment of ...

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Problems solved by technology

[0005] In view of the above existing problems or deficiencies, in order to solve the problem of huge amount of calculation when the existing numerical methods solve large-scale multi-scale time-domain electromagnetic problems, the present invention provides an electromagnetic multi-scale calculation method based on hybrid grid and time step

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