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Method for designing prestressed cable structure initial configuration based on optimization algorithm

A prestressed cable and optimization algorithm technology, applied in the direction of calculation, calculation model, special data processing application, etc., can solve the problems that the new prestressed cable-strut structure system has not been well solved, and the unit connection mode is unknown, etc., to achieve Good stability, easy design process, and high solution efficiency

Active Publication Date: 2015-12-30
SOUTHEAST UNIV
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Problems solved by technology

However, the shape problems of the new prestressed cable-strut structural system have not been well resolved
In addition, because the existing form-finding methods usually need to pre-specify the connection mode of the elements, and use parameters such as node coordinates or element force density as the main variables, but in the early stage of structural design, some boundary conditions or constraints are often known, and Unit connections are unknown (or difficult to pre-specify)

Method used

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  • Method for designing prestressed cable structure initial configuration based on optimization algorithm
  • Method for designing prestressed cable structure initial configuration based on optimization algorithm
  • Method for designing prestressed cable structure initial configuration based on optimization algorithm

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0024] figure 1 It is a flowchart of the method of the present invention. The typical feature of the invention is that the geometric connection mode of the component units in the structure is used as the only independent variable instead of other parameters such as node coordinates and unit force density, which meets the actual needs of designers for novel structural configurations. In the case of given node coordinates, in order to design a novel and reasonable prestressed cable-strut structure configuration, the form analysis problem is expressed as an optimization problem considering constraints:

[0025] max:f(C)(1)

[0026] s.t.C ∈ [C L ,C U ]; m(C) s(C)>0

[0027] In the formula, the variable matrix C is used to describe the structural configuration of the cable-strut structure (generally called the correlation matrix), and different unit connectio...

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Abstract

The invention discloses a method for designing a prestressed cable structure initial configuration based on an optimization algorithm. With a geometrical connecting mode of a structural unit as a unique independent variable, the method is suitable for design and analysis of a modern space structure. The method mainly comprises the steps of performing parameter initialization, successively accessing a next city, and determining a unit connecting mode according to a virtual path; judging whether the number of connecting units of each node meets the requirements; constructing an initial configuration, and judging whether an obtained structure meets the design requirements; finally, if the obtained optimal configuration meets the requirements, outputting a configuration design scheme and ending the process, or else executing the initial step again, and performing redesign according to the structure configuration.

Description

technical field [0001] The invention belongs to the field of space structure design and analysis, and relates to a method for designing the initial configuration of a prestressed cable-strut structure based on an optimization algorithm. Background technique [0002] Prestressed cable-strut structures usually have self-stress modes and internal mechanism displacement modes at the same time, mainly including cable domes, tensegrity, cable-stayed grids, etc. This type of new structural form has been developed rapidly in recent years. The initial configuration design of the new type of prestressed cable-strut connection is the structural shape problem that needs to be solved first. The initial configuration of the structure is mainly determined by the following parameters: node information, unit connection mode, unit type, unit initial length (or force density), unit section stiffness, etc. Therefore, the solution to the initial shape problem of the prestressed cable-strut str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/00
Inventor 陈耀冯健
Owner SOUTHEAST UNIV
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