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Cable-strut tension structure rod piece section optimization method and system based on importance analysis

A technology of tension structure and optimization method, which is applied in the field of architectural design, can solve problems such as incomplete expansion, achieve the effect of preventing continuous collapse, improving structural robust performance, and good theoretical research and engineering application value

Pending Publication Date: 2020-09-08
WENZHOU UNIVERSITY
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Problems solved by technology

In addition, the topology optimization design of space large-span structures mostly focuses on rigid space structure systems such as space grid structures, and topology optimization in the strict sense has not been fully developed in cable-strut tension structures.

Method used

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  • Cable-strut tension structure rod piece section optimization method and system based on importance analysis
  • Cable-strut tension structure rod piece section optimization method and system based on importance analysis
  • Cable-strut tension structure rod piece section optimization method and system based on importance analysis

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Embodiment 1

[0063] A method for optimizing the section of a cable-strut tension structure based on importance analysis, comprising the following steps:

[0064] (1) For the cable-strut tension structure to be optimized, obtain the importance coefficients of all types of flexible members under normal load conditions; the cable-strut pretension structure to be optimized includes the cable-strut pretension topological structure , single structure, the initial cross-sectional size of various rods, and the modulus of elasticity.

[0065] The cable-strut pretension structure to be optimized loaded in this embodiment is as follows: image 3 As shown, its parameters are shown in Table 1:

[0066] Table 1 Initial prestress value and section parameters of the structure

[0067]

[0068] The prestress can be obtained by singular value decomposition method; the importance coefficient is the rate of change of structural strain energy of the cable-strut tension structure before and after removing ...

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Abstract

The invention discloses a cable-strut tension structure rod piece section optimization method and system based on importance analysis. The method comprises the following steps: (1) for a to-be-optimized cable-strut tension structure, obtaining importance coefficients of all types of rod pieces in a normal load state of the to-be-optimized cable-strut tension structure; (2) selecting a rod piece with the maximum importance coefficient, and reducing the importance of the type of rod piece to the minimum value to serve as an optimization target; (3) performing global optimization by taking the sizes of the cross sections of various rod pieces as optimization parameters to obtain optimized cross section areas of the rod pieces; and (4) obtaining an optimized cable-strut tension structure. Thesystem comprises an optimization target selection module, an iterative optimization module and a rod piece importance analysis module. Aiming at the technical problem that a cable-strut tension structure is lack of effective structural performance-based optimization design, the cross section is optimized, so that the importance coefficient of the strut member with the maximum strut member importance coefficient is as small as possible, and the strut member importance of a target category is effectively reduced after optimization.

Description

technical field [0001] The invention belongs to the field of architectural design, and more specifically relates to a method and system for optimizing the section of a cable-strut tension structure member based on importance analysis. Background technique [0002] The cable-strut tension structure is a flexible structure composed of cables and compression rods and formed by tensioning. Due to the full use of the high strength of the cables and the controllability of the pretension, the structure has strong spanning ability, good economic performance, Lightweight and other characteristics, it has been widely used in large public buildings such as stadiums and stadiums at home and abroad. At the same time, due to the low redundancy of this type of structure, and all high-strength cables bear the load and provide stiffness, the components bear high strain energy, and once damaged, continuous overall collapse may occur. Therefore, exploring the performance of this type of struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23G06F30/27G06N3/12G06Q50/08G06F119/14G06F111/04G06F111/10
CPCG06N3/126G06Q50/08G06F30/13G06F30/23G06F30/27G06F2111/04G06F2111/10G06F2119/14
Inventor 陈联盟章禾王秋霞刘毅杰姜智超周一一张福勃
Owner WENZHOU UNIVERSITY
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