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A hybrid intelligent optimization method for a spatial structure

A technology of intelligent optimization and spatial structure, applied in the direction of design optimization/simulation, special data processing application, calculation model, etc. practical effect

Active Publication Date: 2019-03-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0002]The long-span space structure in my country, especially the string structure (such as: string beam, string truss, string dome, etc.) However, with the further increase of the structural span and the increasing complexity of the structural modeling, the traditional steel structure or space structure design concepts and methods can no longer fully meet its development requirements, namely: according to the experience of structural engineers or through repeated trial calculations and The method of comparison and selection has been difficult to achieve satisfactory results

Method used

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  • A hybrid intelligent optimization method for a spatial structure
  • A hybrid intelligent optimization method for a spatial structure
  • A hybrid intelligent optimization method for a spatial structure

Examples

Experimental program
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Embodiment

[0034] In order to study the applicability of the PP algorithm, this example selects a typical K8-type suspensive dome structure as the analysis object, uses MATLAB and ANSYS APDL language to write the hybrid algorithm operation file, according to figure 2 The collaborative workflow of the prestressed spatial structure is used for prestressed optimization analysis.

[0035] The structure of the suspension dome is shown in Figure 3. The plane projection is circular. The span of the structure is 80m, the height of the rise is 8m (the rise-span ratio is 1 / 10), and the lower part is equipped with three rings of cable-strut system. The materials and specifications of the components are shown in Table 1. .

[0036] Table 1 Material and Specifications of Components

[0037]

[0038]

[0039] The nodes of the upper single-layer reticulated shell are rigidly connected, and the heights of the lower circles of braces from inside to outside are 4.9m, 5.7m, and 6.6m respectively. ...

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Abstract

The invention discloses a hybrid intelligent optimization method (PP algorithm) for a spatial structure. The method omprises the following steps: firstly, utilizing the global searching ability of particle swarm optimization algorithm (PSO) with high inertia weight to carry out preliminary screening on feasible region space, selecting a feasible solution which falls near the global optimum solution and taking it as initial growth point to provide initial value for subsequent simulated plant growth algorithm (PGSA); Then, the optimal solution obtained by PSO is used as the initial growth point,and the global optimal solution satisfying the requirements can be found quickly and accurately by using the growth space optimization method based on the strong local search ability of PGSA and thegood or bad value of objective function.

Description

technical field [0001] The present invention relates to the field of spatial structure optimization design, in particular to a hybrid intelligent optimization method for spatial structure; that is, a spatial structure optimization method based on improved simulated plant growth-particle swarm, including: section optimization, prestress optimization, shape and topology Optimization, construction optimization (design and optimization of structural installation and prestressed tensioning scheme), etc. Background technique [0002] The long-span space structure in my country, especially the string structure (such as: string beam, string truss, string dome, etc.) Complicated, the traditional steel structure or space structure design concepts and methods can no longer fully meet its development requirements, that is, it is difficult to achieve satisfactory results based on the experience of structural engineers or through repeated trial calculations and comparisons. Therefore, in ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/00
CPCG06N3/006G06F30/23G06F30/13Y02T90/00
Inventor 石开荣林全攀姜正荣许洁槟阮智健
Owner SOUTH CHINA UNIV OF TECH
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