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Optimized form finding method for cable net structure

A cable network structure and equation technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problem of not being able to selectively control the coordinates of a single node, and achieve the effect of good applicability

Active Publication Date: 2021-07-23
TONGJI UNIV
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Problems solved by technology

In addition, the existing force density method can only select fixed nodes, and cannot selectively control the coordinates of a single node

Method used

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  • Optimized form finding method for cable net structure
  • Optimized form finding method for cable net structure
  • Optimized form finding method for cable net structure

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specific Embodiment approach

[0131] Such as image 3 and 4 As shown, the present invention provides two kinds of form-finding processes respectively, and the specific implementation methods are as follows:

[0132] 1. It can be seen from the derivation that when the external load is zero and the force of the members of the cable net is the same, the total length of the members is the smallest. At this time, the solution equations of the two are equivalent. On the mathematical level, Prato proposed the extreme The concept of small curved surface, the conjecture caused by soap bubbles, using an iron wire, will form a colored film in a balanced state. If we ignore the weight of the mixed liquid itself, and do not consider external disturbance factors such as wind force, then the potential energy of the film will reach the minimum value under the action of surface tension, and the curved shape presented by the soap film must have the minimum area. At present, the common minimal surfaces with analytic formul...

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Abstract

The invention relates to an optimized form finding method for a cable net structure, which comprises the following steps: 1) constructing an initial cable net structure, and obtaining the initial length, initial axial force and external load of each rod unit in the initial cable net structure; 2) taking the minimum sum of the lengths of all rod units of the cable net structure as an optimization target, and constructing an overall equilibrium iteration equation containing all nodes of the cable net structure; and 3) considering boundary applying conditions, and solving the overall balance iteration equation by adopting an iteration or direct solving mode according to different input parameters and solving targets to obtain a final optimized cable net structure. Compared with the prior art, the method has the advantages that the total length design requirement is met, the boundary condition is flexibly designed, the applicability is high, and the grid division mode is irrelevant.

Description

technical field [0001] The invention relates to the field of space structure design, in particular to an optimized form-finding method for a cable net structure. Background technique [0002] Spatial discrete structure is a structural system composed of rods arranged regularly along the curved surface. With the increasing span of the structure and the complexity of structural modeling, traditional spatial structure design concepts and methods cannot fully meet its development needs. The structure whose load is mainly transmitted through the axial force of the member follows the principle of "form follow force". Since there is no bending moment, the shape of the structure is mainly controlled by the force. Both the tensioned spatial cable-net structure and the compressed reticulated shell structure follow this criterion. In practice, usually only the boundary conditions of the structure are known, and the specific shape needs to be obtained by form-finding methods. By ratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14
CPCG06F30/23G06F30/17G06F2119/14
Inventor 刘超詹海鹏
Owner TONGJI UNIV
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