Parametric modeling method of spatial reticulated shell based on grasshopper

A parametric modeling and reticulated shell technology, which is applied in the fields of electrical digital data processing, design optimization/simulation, special data processing applications, etc., can solve the problems of difficulty in modeling space reticulated shell structures and low modeling efficiency, and achieve improved The effect of generation and modification speed, simple design method, and improved modeling efficiency

Active Publication Date: 2019-01-08
HENAN ENG DESIGN CONSULTANTS OF CSCEC
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Problems solved by technology

[0004] Aiming at the technical problems of difficulty in modeling and low modeling efficiency of existing space reticulated shell structures with complex shapes, the present invention proposes a parametri

Method used

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  • Parametric modeling method of spatial reticulated shell based on grasshopper
  • Parametric modeling method of spatial reticulated shell based on grasshopper
  • Parametric modeling method of spatial reticulated shell based on grasshopper

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example 1

[0033] Model example 1: The plug-in connection diagram of the generation of the ridge-line fork cylinder reticulated shell is as follows figure 2 As shown in (a), different ridge-line fork cylinder surfaces can be obtained by changing the span of the bottom contour line, the height of the sag, the number of ridge lines, and the parameter values ​​​​of the two adjustment points of the ridge line. The specific method to generate the ridge-type fork-tube surface is: 1) The polygon plug-in forms the polygon at the bottom. The R and S of the polygon plug-in are the radius and the number of sides of the polygon respectively, and the polygon is parameterized and controlled by the span input plug-in and the number of ridge line input plug-ins. Shape, use the line segmentation plug-in to divide the polygon into S equal parts to get the corner points of the polygon. 2) Use the sag height input plug-in and the generated point plug-in to generate vertices, adjust the Z coordinate of the ...

example 2

[0034] Model example 2: The generation method of the ridge-line fork cylinder reticulated shell on the rectangular projection surface, such as image 3 shown. Different fork cylinder surfaces can be obtained by changing the length and width of the bottom rectangle, the height of the sag and the parameter values ​​​​of the two adjustment points of the ridge line. image 3 (a) and 3(b). The specific method of generating the ridge-type fork cylinder surface is: 1) Use the rectangle plug-in to form the bottom rectangle. The length input plug-in and the width plug-in respectively use the half value of the length and width to parameterize and control the shape of the rectangle, and use the line control point plug-in to obtain the corner points of the rectangle. 2) Use the sag height input plug-in and the generated point plug-in to generate vertices, adjust the Z coordinate of the point through the sag height parameterization, X is half the width of the rectangle, and Y is 0 to get...

example 5

[0038] Model Example 5: The parametric modeling method of the shell surface reticulated shell with holes is similar to the parametric modeling method of the shell surface reticulated shell. its different like Figure 6 (a) shown. Different shell surfaces with holes can be obtained by changing the diameter of the inner and outer control circles of the bottom contour line, the height difference between the inner and outer control levels, the number of ring symmetry and the parameter values ​​​​of the two adjustment points of the ridge line, and the radius of the hole circle. The specific method of generating the shell surface is: 1) The polar coordinate grid plug-in forms the inner shape control point and the outer shape control point. The input plug-ins of inner and outer control circle diameters and circumferential symmetry numbers respectively parameterize the polar diameter length and points of the control points; the Z coordinates of the adjustment points are parameterized...

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Abstract

The invention provides a parametric modeling method of a spatial reticulated shell based on grasshopper, which is used for solving the modeling difficulty of the existing complex-shaped spatial latticed shell structure, the modeling efficiency is low, and the repeated utilization ratio is low. The method comprises the following steps: determining the geometric parameters of the spatial lattice shell model by using the geometric relationship, and expressing each geometric parameter by using the corresponding input plug-in; based on the two-point adjustment method, generating the corresponding fork-cylinder surface or shell surface by using the application plug-in; using the isoparametric method to mesh the surface of the ridge to generate the local mesh; generating a single-layer fork-cylinder reticulated shell or a single-layer shell reticulated shell by gridding all the curved surfaces of the ring array plug-in. The invention can greatly improve the generation and modification speed of the model by using the parametric modeling, and improves the working efficiency. The design method is simple and efficient. It is very convenient for the analysis and optimization of spatial latticed shell structure with complex shape under different types and different parameters by using finite element design software.

Description

technical field [0001] The invention relates to the technical field of auxiliary architectural design, in particular to a parametric modeling method for space 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. The reticulated shell structure is a spatial structure in the form of a curved shell. It uses the rod structure to realize the architectural modeling of various spatial surfaces, because of its reasonable structural characteristics, large span, flexible adaptability to various architectural shapes, architectural modeling and structural stress and structural force of rods and node layout. With a series of advantages such as good comprehensive effect of economic indicators and beautiful appearance, it has been w...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 张帅亮雷红兵陈莉张海东鲁海方李彦舞
Owner HENAN ENG DESIGN CONSULTANTS OF CSCEC
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