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Quadrangle segmentation method applied to finite element analysis

A quadrilateral, finite element technique used in computer-aided design and engineering applications

Active Publication Date: 2017-08-22
HANGZHOU DIANZI UNIV
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  • Application Information

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Problems solved by technology

[0004] However, the above methods are all theoretical implementations, and have not been implemented and applied in various mainstream software.

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  • Quadrangle segmentation method applied to finite element analysis
  • Quadrangle segmentation method applied to finite element analysis
  • Quadrangle segmentation method applied to finite element analysis

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Embodiment Construction

[0066] The present invention will be further described below in conjunction with accompanying drawing.

[0067] The quadrilateral segmentation method applied to finite element analysis, the specific steps are as follows:

[0068] Step 1, such as figure 1 As shown, import the geometry model into the finite element analysis software, cut the geometry with a through hole, and the cross section obtained after cutting the geometry is a polygon with inner and outer boundaries, or a polygon Fitted plane graphics.

[0069] Step 2, such as figure 2 As shown, the multi-connected domain is transformed into a single-connected domain;

[0070] The multi-connected domain described in the present invention is only applicable to one inner boundary.

[0071] Let the set of all vertices on the inner boundary of the resulting plane figure be the point set V 1 , the set of all vertices on the outer boundary is the point set V 2 . at point set V 1 and V 2 find point v in a , u b The di...

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Abstract

The invention discloses a quadrangle segmentation method applied to finite element analysis. Division of quadrangle grids is achieved in all kinds of mainstream software. The method comprises steps of firstly changing multiple connected polygons into single connection; then, reducing the number of boundary fixed points and extracting geometrical characteristics of boundaries in a boundary simplifying process; decomposing original polygons into relatively simple geometrical shapes, thereby facilitating topology generation and mapped polygons; carrying out topology generation, and using a fixed topology mode to match different sub polygons so as to finish construction of a topology structure; and finally, using an ultralimit interpolation mapping method to obtain a finally grid. According to the invention, a high quality quadrangle grid segmentation method is provided; the generated quadrangle grids have few singular points, good smoothness, uniformity and orthogonality, and can be directly applied to infinite element analysis, simulation and solving.

Description

technical field [0001] The invention belongs to the field of computer-aided design and engineering application, and in particular relates to a quadrilateral segmentation method of plane polygons applied to finite element analysis. Background technique [0002] Quadrilateral grid is a commonly used grid in two-dimensional space scientific computing problems, and the research on quadrilateral grid subdivision method in two-dimensional plane domain is also a very concerned research topic today. At present, many scholars have conducted a large number of related researches on the method of quadrilateral mesh division, and have also proposed many division algorithms or improved algorithms. [0003] For now, the division of quadrilateral grids can be divided into two categories from the realization methods, one is the indirect method, and the other is the direct method. The indirect method first generates a triangular mesh, and then converts the triangular mesh into a quadrilatera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06F17/50
CPCG06F30/23G06T17/205G06T2210/36
Inventor 徐岗舒来新许金兰朱亚光潘德燃吴卿
Owner HANGZHOU DIANZI UNIV
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