Parametric modeling method of folded plate reticulated shell based on grasshopper

A parametric modeling, plate mesh technology, applied in electrical digital data processing, design optimization/simulation, special data processing applications, etc. The design method is simple, the force analysis and structural design optimization are improved, and the modeling efficiency is improved

Active Publication Date: 2019-01-11
HENAN ENG DESIGN CONSULTANTS OF CSCEC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of difficulty in modeling and low modeling efficiency of existing folded-plate reticulated shell structures with complex shapes, the present invention proposes a parametric modeling method for folded-plate reticulated shells based on grasshopper. Using parametric modeling can greatly improve the model The speed of generation and modification, thus improving work efficiency

Method used

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  • Parametric modeling method of folded plate reticulated shell based on grasshopper
  • Parametric modeling method of folded plate reticulated shell based on grasshopper
  • Parametric modeling method of folded plate reticulated shell based on grasshopper

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example 1

[0037] Model example 1: The generation method of the first type of folded-plate reticulated shell, such as figure 2 shown. The method of generating the folded plate surface: 1) Use the polygon plug-in to form the bottom polygon. The input terminals R and S of the polygon plug-in are the radius and the number of sides of the polygon respectively, and the shape of the polygon is controlled parametrically. Use the line segmentation plug-in to divide the bottom polygon into S equal parts to obtain polygon corner points, that is, the input terminal N of the line segment segmentation plug-in is connected to the S of the side number input plug-in. 2) The generated point plug-in is connected with the sagittal height input plug-in, and the sagittal height is parameterized to adjust the Z coordinate of the vertex, and X and Y are 0 to obtain the vertex coordinates. Use the two-point straight line plug-in to connect the central vertex and the corner points of the polygon to form a ridg...

example 2

[0039] Model example two: pass image 3 The plug-in connection diagrams shown in (a) and (b) can form the first type of folded plate single-layer single-diagonal bar reticulated shell, such as image 3 (d) shown. image 3 The meaning of the geometric parameters of (a) is the same as figure 1 (a) are similar. The specific method of generating the single oblique rod type folded-plate reticulated shell: 1) The bottom polygon is generated by the formation of the polygon plug-in. The input terminals R and S of the polygon plug-in are the radius and the number of sides of the polygon respectively. The plug-in parametrically controls the shape of the polygon, and the line segmentation plug-in is used to divide the polygon into 2 times S equal parts to obtain the corner points and the midpoint of the bottom edge of the polygon. Separate polygon corners and base midpoints by data splitting plug-in. 2) Use the sagittal height input plug-in as the input terminal of the center point g...

example 3

[0044] Model example three: such as Figure 5 As shown, the generation method of the second type of folded-plate reticulated shell is as follows: 1) The bottom polygon is formed by the polygon plug-in, the input terminals R and S of the polygon plug-in are the radius and the number of sides of the generated polygon respectively, and the plug-in and the folded-plate ring are input through the radius The shape of the polygon can be parametrically controlled by inputting the number of copies into the plug-in, and the polygon is divided into 2 times S equal parts by the line segment segmentation plug-in to obtain the corner points and the midpoint of the bottom edge of the polygon. Separate polygon corners and base midpoints by data splitting plug-in. 2) Use the sagittal height input plug-in as the input of the center point generation plug-in, adjust the Z coordinate of the point through the sagittal height parameterization, and get the vertex coordinates with X and Y as 0 to get ...

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Abstract

The invention provides a parametric modeling method of a folded plate reticulated shell based on grasshopper, which is used for solving the problems of modeling difficulty, low modeling efficiency andlow repetition utilization rate of the existing space folded plate reticulated shell with complex modeling. The invention comprises the following steps: expressing the geometrical parameters of a lattice shell model to be established by corresponding input plug-ins; generating a flap surface or quasi-spherical surface by using the application plug-ins according to geometrical relation; selectingone of the planes and using an isoparametric method or subdivision method to mesh a folded surface to generate local meshes; gridding all the planes by the circumferential array plug-in, and generating the single-layer folded latticed shell by connecting the bars with the plug-in. The invention has the advantages of simple design method, new model can be established by changing the parameter valuein the model, the modeling efficiency can be improved, the force analysis and the structural design optimization of the complex space reticulated shell structure under different types and different parameters are improved greatly and conveniently, and the use of the complex space reticulated shell structure is promoted.

Description

technical field [0001] The invention relates to the technical field of auxiliary architectural design, in particular to a parametric modeling method for folded-plate reticulated shells based on grasshopper. Background technique [0002] With the advancement of technology and the improvement of conservation awareness, steel structure buildings with beautiful shapes, reasonable stress, and green environmental protection have developed rapidly in the field of structural design. As one of the important components of the steel structure, the large-span spatial grid structure is widely used in terminals, high-speed railway stations, stadiums and other buildings. Its advantages are light structure, reasonable force, and beautiful appearance. The reticulated shell is a space bar structure similar to the flat grid. It is based on bars, forms a grid according to certain rules, and is a space frame arranged according to the shell structure. It has the properties of bar systems and shel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 张帅亮雷红兵陈莉张海东李彦舞鲁海方
Owner HENAN ENG DESIGN CONSULTANTS OF CSCEC
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