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A Multi-Order FDTD Grid Modeling Method

A modeling method and grid technology, applied in the field of 3D modeling technology, can solve problems such as complex models of media materials and complex FDTD, and achieve the effect of optimized processing and flexible modeling

Active Publication Date: 2018-11-20
JIANGSU UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-level FDTD grid modeling method 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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  • A Multi-Order FDTD Grid Modeling Method

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Embodiment Construction

[0041] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] 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 the FDTD grid. In the figure, the FDTD grid assignment is the number of the part where the triangular surface element is located.

[0043] Such as figure 2As 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.

[0044] 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 o...

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Abstract

The invention discloses a multi-order FDTD grid modeling method. The method generates a triangular surface element model based on commercial software Hypermesh, and then processes the triangular surface element model to generate a multi-order precision FDTD grid. The method achieves the free selection of space step, generates the multi-order precision FDTD grid, and solves a problem of complex models of various types of dielectric materials. Finally, the method verifies the accuracy of a modeling result through the FDTD grid generated through CAD detection. The method can solve a problem of FDTD modeling of a complex target model, a problem of FDTD modeling of various types of materials, and a problem of the refining of features of a special part.

Description

technical field [0001] The invention belongs to the field of electromagnetic field numerical calculation, and in particular relates to a 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 prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 杨利霞丁元赫周祥
Owner JIANGSU UNIV
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