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Method for generating FDTD (Finite Difference Time Domain) grids

A grid and format technology, which is applied in the field of electromagnetic field numerical calculation, can solve problems such as complex models of dielectric materials and complex FDTD modeling, and achieve the effect of flexible modeling.

Inactive Publication Date: 2016-01-27
JIANGSU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for generating FDTD grids to solve complex models and multiple material FDTD modeling problems
Realize the free selection of space step, generate FDTD grids of different specifications, and solve the problem of complex models of various media materials at the same time:

Method used

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  • Method for generating FDTD (Finite Difference Time Domain) grids
  • Method for generating FDTD (Finite Difference Time Domain) grids
  • Method for generating FDTD (Finite Difference Time Domain) grids

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Embodiment Construction

[0038] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] Such as figure 1 As shown, it means that the triangular surface element is in an FDTD grid. In modeling, the size of the triangular surface element is usually very small, and the size of the FDTD grid is relatively large, so the situation in the figure represents most of the triangular surface elements and Relationships of FDTD grids. In the figure, the FDTD grid assignment is the number of the part where the triangular surface element is located.

[0040] Such as figure 2 As shown in the figure, a triangular surface element is in two FDTD grids, and these two FDTD grids are assigned the number of the part where the triangular surface element is located.

[0041] Such as image 3 As shown, the stl format triangle surface element model data is that every 7 lines represent a triangle surface element, and the coordinates of ...

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Abstract

This invention discloses a method for generating FDTD grids. The method comprises the following steps: generating a model of a triangle surface element based on a commercial software Hypermesh, and processing the model to generate the FDTD grids; generating FDTD grids with different specifications by freely selecting space intervals to solve the problem of the complex model composed of a variety of medium materials simultaneously; at last, checking the accuracy of the modeling result through the FDTD grids generated by CAD (Computer-Aided Design) detection. The method provided by this invention can solve the FDTD modeling problem of complex target model and the FDTD modeling problem of a variety of medium materials.

Description

technical field [0001] The invention belongs to the field of electromagnetic field numerical calculation, and in particular relates to a FDTD three-dimensional modeling technology. Background technique [0002] In recent years, with the rapid development of commercial modeling software, the modeling of complex models has become very convenient. However, when using the FDTD method to study the electromagnetic scattering characteristics of objects, the grid discretization must be carried out according to the requirements of FDTD, that is, the FDTD calculation area is divided into hexahedral cells (cuboids) as units, and the medium parameters of each unit are determined. [0003] With the widespread adoption of the FDTD method and the continuous improvement of the algorithm, the demand for FDTD calculation of complex models is becoming stronger and stronger. Ordinary modeling can only generate simple models according to the analytical formula of the model, and cannot solve the...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/30
Inventor 杨利霞丁元赫周祥
Owner JIANGSU UNIV
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