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Inside-to-outside hexahedron grid generation method

An inside-out grid generation technology, which is applied in image data processing, 3D modeling, instruments, etc., can solve a lot of time problems and achieve the effect of uniform size and uniformity

Active Publication Date: 2012-09-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex and irregular geometry of entities in the real world, it often takes a lot of time to establish high-quality finite element meshes

Method used

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  • Inside-to-outside hexahedron grid generation method
  • Inside-to-outside hexahedron grid generation method
  • Inside-to-outside hexahedron grid generation method

Examples

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Embodiment Construction

[0053] Refer to attached picture. The invention relates to a method for generating a hexahedron grid from inside to outside. The input 3D body domain in the present invention is represented by a discrete tetrahedron grid, and is required to be a cylinder-like domain with a main axis direction. The present invention utilizes the shape characteristics of the volume domain to construct the main direction harmonic field, and constructs the radial harmonic field conjugated thereto and the initial hexahedral grid in the volume domain; then under the guidance of the main direction harmonic field and the radial harmonic field manifold lines , the initial hexahedral mesh in the volume domain is pushed from the inside to the outside to the solid boundary to generate a high-quality hexahedral mesh for the given volume domain.

[0054] Each part is described in detail below according to the steps of the present invention:

[0055] 1. Main direction harmonic field construction

[0056]T...

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Abstract

The invention provides an inside-to-outside hexahedron grid generation method which comprises the following steps of: (1) interactively constructing a principal direction reconciling field according to the input tetrahedron grid of an entity body domain; (2) constructing an initial hexahedron grid in the body domain and a radial reconciling field by use of the principal direction reconciling field; and (3) with the guide of the principal direction reconciling field and the radial reconciling field, pushing the initial hexahedron grid to the entity boundary from inside to outside to generate a hexahedron grid of the entity body domain. The method provided by the invention can generate high-quality hexahedron grids with uniform sizes and regular arrangement for a quasi-cylindrical body domain, and can establish a high-simulation finite element model for various numerical simulation problems.

Description

technical field [0001] The invention relates to an inside-out hexahedron grid generation method for a cylinder-like domain. Background technique [0002] In recent years, numerical simulation methods have been more and more widely used to simulate various scientific and engineering problems on three-dimensional entities, such as the simulation of structural mechanical properties, fluid mechanical properties, thermal conductivity, and mechanical properties of biological tissues. The important precondition of the numerical simulation method is to establish a discrete finite element grid that accurately describes the geometry of the three-dimensional solid. Due to the complex and irregular geometry of entities in the real world, it often takes a lot of time to establish high-quality finite element meshes. [0003] The finite element grid is the basis of numerical simulation, and the geometric similarity, mechanical similarity and unit arrangement structure of the grid model wi...

Claims

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Application Information

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IPC IPC(8): G06T17/20G06T19/00
Inventor 李孟飞童若锋唐敏
Owner ZHEJIANG UNIV
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