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Grasshopper-based complex variable-density porous structure modeling method

A technology of porous structure and modeling method, applied in 3D modeling, image data processing, special data processing applications, etc., can solve problems such as poor controllability, difficult construction, and singleness of variable-density porous structures.

Pending Publication Date: 2021-11-26
GUANGZHOU HUAGONG MOTOR VEHICLE INSPECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects and deficiencies of the existing technology, the present invention provides a complex variable density porous structure modeling method based on Grasshopper. This method solves the singleness, difficulty in construction, local parameterization, and Poor controllability and other shortcomings, it has great convenience and operability in the development of complex variable density porous structure models

Method used

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  • Grasshopper-based complex variable-density porous structure modeling method
  • Grasshopper-based complex variable-density porous structure modeling method
  • Grasshopper-based complex variable-density porous structure modeling method

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Embodiment 1

[0060] Such as figure 1 As shown, the present embodiment provides a Grasshopper-based complex variable density porous structure modeling method, including the following steps:

[0061] S1: Use Grasshopper to establish a space frame for filling porous structures, and fill in voxels in the space frame;

[0062] Such as figure 2 As shown, in order to make the unit cells filled into voxels and scaled in equal proportions along the x, y, and z directions, the voxels in step S1 are all cubes with the same size; the size of the voxels may be different from the size of the outer contour of the unit cells , when filling, the unit cell will be scaled to fit the size of the voxel, and the voxel is a cube to ensure that the unit cell structure does not deform.

[0063] S2: Use Grasshopper to construct a porous structure unit cell;

[0064] Such as image 3 As shown, in order to make the subsequent offset grid surface and generate variable density porous structure normally, the unit c...

Embodiment 2

[0087] A complex variable density porous structure modeling system based on Grasshopper, including: space frame building block, voxel filling block, porous structure unit cell building block, porous structure unit cell filling block, normal vector direction unification block, grid surface replication And the normal vector direction reversal module of the mesh surface, the offset distance generation module, the mesh offset module, the mesh surface edge connection mesh generation module, the welding module and the softening module;

[0088] In this embodiment, the space frame building block is used to construct a space frame for filling porous structures using Grasshopper;

[0089] In this embodiment, the voxel filling module is used to fill in voxels in the space frame;

[0090] In this embodiment, the porous structure unit cell building block is used to construct the porous structure unit cell using Grasshopper;

[0091] In this embodiment, the porous structure unit cell fill...

Embodiment 3

[0100] This embodiment provides a storage medium, the storage medium can be a storage medium such as ROM, RAM, magnetic disk, optical disk, etc., and the storage medium stores one or more programs. Grasshopper's method for modeling complex variable density porous structures.

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Abstract

The invention discloses a Grasshopper-based complex variable-density porous structure modeling method, which comprises the following steps of: constructing a space framework filled with voxels by adopting Grasshopper, constructing porous structure unit cells, and filling the porous structure unit cells into the voxels to obtain a grid surface; unifying the grid surface normal vector direction, copying the grid surface, reversing the copied grid surface normal vector, and generating two sets of offset distances, wherein the offset distances corresponding to different parts of the grid are different; shifting the grid surfaces and deleting the original grid surfaces, generating a connection grid to connect the two shifted grid surfaces, and welding all grids to obtain a closed variable-density porous structure network model; and softening the closed variable-density porous structure network model to obtain a refined closed variable-density porous structure network model. According to the method, the porous structure models with different porosities and different variable density forms can be automatically and quickly obtained by changing parameters, and the method is suitable for various basic units.

Description

technical field [0001] The invention relates to the technical field of 3D printing-oriented porous structure modeling, in particular to a Grasshopper-based modeling method for complex variable-density porous structures. Background technique [0002] Porous structure is a grid structure composed of through or closed holes. Due to its high strength-to-weight ratio and good impact absorption performance, it is widely used in aerospace, automobile industry, bridge construction and other fields. With the development of additive manufacturing (3D printing) technology, the fabrication of porous structures has become easier and more efficient. In order to give full play to the advantages of light weight and high strength of the porous structure, its mechanical properties and material distribution design have always been a research hotspot in the field of lightweight material structures. [0003] The researchers found that the material distribution of a uniform porous structure is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06T17/20G06F113/10
CPCG06F30/23G06T17/205G06F2113/10
Inventor 叶鸣王英俊卢仲康陈伟侠
Owner GUANGZHOU HUAGONG MOTOR VEHICLE INSPECTION TECH
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