Calculation method and device for explicit time iterative time domain electromagnetic field

An electromagnetic field and time-domain technology, which is applied in the field of time-domain electromagnetic field simulation calculations, can solve problems such as algorithm instability, and achieve the effects of parallel computing, small amount of calculation, and wide application

Inactive Publication Date: 2018-07-31
欢鼎科技成都有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the approximate algorithm is blindly adopted without knowing the electromagnetic field distribution at the current time, it will bring large errors and may cause the algorithm to be unstable.

Method used

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  • Calculation method and device for explicit time iterative time domain electromagnetic field
  • Calculation method and device for explicit time iterative time domain electromagnetic field
  • Calculation method and device for explicit time iterative time domain electromagnetic field

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Experimental program
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Embodiment 1

[0079] A prediction method in time-domain electromagnetic field numerical calculation, the time-domain electromagnetic field numerical calculation adopts explicit iteration on time, the iteration time step is limited by the Courant-Friedrichs-Lewy condition, in the previous time step, only the position to be sought and the position to be sought Finding the electromagnetic field value at the adjacent position of the position will have an impact on the position to be sought at the current time step, and it is characterized in that:

[0080] The electromagnetic field value of the position to be requested in the current time step is predicted by the electromagnetic field value of the position to be requested in the previous time step and the adjacent positions of the position to be requested.

[0081] The numerical calculation of the electromagnetic field in the time domain includes but is not limited to numerical calculation methods such as FDTD and DGTD, which are not specificall...

Embodiment 2

[0089] see figure 1 , this embodiment provides an explicit iterative time-domain limited electromagnetic field calculation method limited by the Courant-Friedrichs-Lewy stability condition, including:

[0090] 101 Comparing the electromagnetic field value of each position to be requested in the previous time step with the judgment condition, if the judgment condition is satisfied, the position belongs to area 2, otherwise it belongs to area 1;

[0091] 102 traverse all the positions in the existing area 1, and let all their adjacent positions also belong to the area 1;

[0092] 103 adopt Algorithm 1 for all positions in Area 1, and use Algorithm 2 for all positions in Area 2;

[0093] said location is a grid cell or a grid edge or a grid node;

[0094] The first algorithm is a universal algorithm that can be used for any electromagnetic field value at the location to be sought, and the second algorithm is an approximate algorithm that can be used when the electromagnetic fie...

Embodiment 3

[0107] Referring to FIG. 201 , it is a rectangular two-dimensional calculation area and grid division. This embodiment uses this structure as a specific embodiment, and this structure is not intended to limit the present disclosure. This embodiment provides an explicit iterative time-domain limited electromagnetic field calculation method limited by the Courant-Friedrichs-Lewy stability condition, the process is as follows figure 1 ,include:

[0108] 101 Comparing the electromagnetic field value of each position to be requested in the previous time step with the judgment condition, if the judgment condition is satisfied, the position belongs to area 2, otherwise it belongs to area 1;

[0109] 102 traverse all the positions in the existing area 1, and let all their adjacent positions also belong to the area 1;

[0110] 103 adopt Algorithm 1 for all positions in Area 1, and use Algorithm 2 for all positions in Area 2;

[0111] The locations are mesh edges or mesh nodes.

[01...

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Abstract

The invention discloses a calculation method and device for an explicit time iterative time domain electromagnetic field, and relates to the field of electromagnetic field numerical calculation. The method comprises the following steps that: comparing the electromagnetic field value of the previous time step of a position to be solved with a judgment condition, if the electromagnetic field value meets the judgment condition, proving that the position belongs to a second area, and otherwise, proving that the position belongs to a first area; traversing all positions in the existing first area,and enabling all adjacent positions of all positions to belong to the first area; and adopting a first algorithm for all positions in the first area, and adopting a second algorithm for all positionsin the second area, wherein the positions are grid cells or grid edges or grid nodes, the first algorithm is a universal algorithm which can be adopted for any electromagnetic field value of the position to be solved, and the second algorithm is an approximation algorithm which can be adopted when the electromagnetic field value of the current time step of the position to be solved meets the judgment condition. The device comprises a judgment module, an adjacent grid processing module and a calculation module. The method has the advantages of wide applicable range, small calculated amount andgood accuracy and stability.

Description

technical field [0001] The present disclosure relates to the field of numerical calculation of electromagnetic fields, in particular to a method and device for simulation calculation of time-domain electromagnetic fields. Background technique [0002] The time-domain electromagnetic field simulation calculation can provide time-domain information, which is convenient for analyzing the electromagnetic response of time-domain pulse and frequency-domain broadband, and can process time-varying media, which has its unique application advantages. The common time-domain electromagnetic field numerical calculation methods are Finite-Difference Time-Domain (FDTD), Finite-Element Time-Domain (FETD), Finite-Volume Time-Domain (FVTD) ), Discontinuous Galerkin Time-Domain (DGTD) and other methods. The simulation calculation of time-domain electromagnetic field is divided into explicit iteration and implicit iteration according to the time step iteration method. Among them, explicit ite...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 买文鼎
Owner 欢鼎科技成都有限公司
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