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Design method of multi-cavity combined air film template suitable for free-form surface thin shell construction

A design method and surface technology, applied in 3D modeling, design optimization/simulation, calculation, etc., can solve the problems of little systematic research on free-form thin shell structures, inability to design and manufacture free-form thin shells, etc., to improve the overall Bearing performance, improvement of form error, effect of preventing local collapse

Active Publication Date: 2020-12-08
孙健峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the inflatable membrane construction templates currently used are relatively regular shapes such as cylindrical shells and spherical shells, which limit the construction of thin shell structures with complex curved surfaces to a certain extent.
Therefore, it is necessary to design and utilize the curved surface thin shell structure, and the existing technology cannot design and manufacture the structure of the free curved surface thin shell
Moreover, there are few systematic studies on thin shell structures with free-form surfaces.

Method used

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  • Design method of multi-cavity combined air film template suitable for free-form surface thin shell construction
  • Design method of multi-cavity combined air film template suitable for free-form surface thin shell construction
  • Design method of multi-cavity combined air film template suitable for free-form surface thin shell construction

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specific Embodiment approach 1

[0030] Specific implementation mode one: combine Figure 1-Figure 3 To illustrate this embodiment, a multi-cavity combined air film design method for a thin shell with a free-form surface described in this embodiment is carried out according to the following steps:

[0031] Step 1: Establish cavity unit: establish the basic unit cavity in Rhinoceros parametric modeling software, the basic unit cavity includes spherical cavity, conical cavity, cylindrical cavity, conical cavity and circular tube arch cavity one or a combination of them;

[0032] Step 2: Splitting complex curved shells: splitting according to the inner surface shape and curvature changes of the free-form thin shells, and dividing the free-form thin shells into multiple regular regions that conform to the basic cavity unit structure;

[0033] Step 3: Preliminary combination of cavities: according to step 2, split and select the corresponding unit cavity for preliminary combination on the Rhino-Grasshopper parame...

specific Embodiment approach 2

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 5, vector-based finite element algorithm and genetic algorithm are used to perform preliminary shape optimization of each cavity unit. Others are the same as the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 6, a diaphragm is provided at the connection of each cavity unit and the material of the diaphragm inside the cavity is PVC film. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a design method of a free-form surface thin shell, in particular to a design method of a multi-cavity combined air film template suitable for free-form surface thin shell construction. The invention aims to solve the problem that a free-form surface thin shell structure cannot be designed and manufactured in the prior art. The method comprises the following steps: 1, establishing a cavity unit; 2, splitting a thin shell with a complex curved surface; 3, conducting cavity preliminary combination; 4, trimming the multi-cavity structure; 5, preliminary conducting shape finding optimization on the cavity unit; and 6, precisely optimizing a multi-cavity combined gas film. The method is used for designing and machining the multi-cavity combined air film template of the free-form surface thin shell structure.

Description

technical field [0001] The invention relates to a design method for a thin shell with a free-form surface, in particular to a design method for a multi-cavity combined air film template suitable for the construction of a thin shell with a free-form surface. Background technique [0002] Compared with the traditional rigid frame construction formwork, the inflatable membrane formwork is widely used in the field of construction of long-span thin shell structures because of its light weight, simplicity, reasonable force and curved surface shape. However, most of the inflatable membrane construction templates currently used are relatively regular shapes such as cylindrical shells and spherical shells, which limit the construction of thin shell structures with complex curved surfaces to a certain extent. Therefore, it is necessary to design and utilize the curved surface thin shell structure, and the prior art cannot design and manufacture the structure of the free curved surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23G06T17/00
CPCG06F30/13G06F30/23G06T17/00
Inventor 刘秀明武岳孙健峰
Owner 孙健峰
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