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A method for shape-finding optimization design of a strong-coupling tree structure

A tree-like structure and optimized design technology, applied in the field of architectural structural engineering, to achieve high precision, high efficiency, and avoid programming work

Active Publication Date: 2019-03-08
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

Therefore, optimizing the stable load-bearing capacity of the rods can improve the stable load-bearing capacity of the overall structure, but there are few research results on this subject

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  • A method for shape-finding optimization design of a strong-coupling tree structure
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  • A method for shape-finding optimization design of a strong-coupling tree structure

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Embodiment Construction

[0061] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples: a form-finding optimization design method for a strongly coupled tree structure, such as figure 2 As shown, including the following processes:

[0062] Step 1: Set the initial parameters according to the design needs, including: tree structure height, section size, and total number of grades. This embodiment is divided into 4 levels. Set the position of the applied load according to the design or actual needs. The node coordinates of the applied load are in It is fixed during the iteration process; the calculated length coefficient μ of each element is set according to the node stiffness, and μ in the following formula i is the calculated length coefficient of the i-th branch;

[0063] Step 2: Establish a dual-unit numerical model, and form a tree structure with a dual-unit numerical model according to the initial parameters. The trunk is v...

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Abstract

A method for shape-finding optimization design of a strong-coupling tree structure includes such steps of setting initial parameters, establishing a tree structure with two-element numerical model; ifm is an odd number, applying the reverse load; solving the internal force of each branch and calculating the temperature load of all branches; if m is an even number, applying a temperature load; extracting vertical displacement of all nodes; changing the node position according to the vertical displacement of the extraction point until the maximum node displacement is less than the threshold value, and finishing the shape-finding process. The method of the invention adopts the two-element numerical model, wherein the cross-sectional area of the rod element is far larger than that of the beamelement, and the beam element is provided with a very small bending rigidity, so as to overcome the problem that the tree-like model of the two-element cannot be solved because the rigidity matrix isnot satisfied with the rank. The method of the invention has very high precision and high efficiency, avoids heavy programming work, couples optimization and shape-finding in one iterative program, converges quickly, and ensures maximum stable bearing capacity of tree structure as a whole.

Description

technical field [0001] The invention relates to the technical field of building structure engineering, in particular to a form-finding optimization design method for a strongly coupled tree structure. Background technique [0002] The tree structure has gradually been widely used due to its beautiful shape and efficient load transfer form. The tree-like structure can efficiently transmit a large range of vertical loads to a point on the ground, so it is widely used in large-scale building structures. Tree-like structures often become landmarks due to their beautiful shapes. Due to its good mechanical properties, many scholars have studied it. [0003] By rationally arranging the spatial positions of the branches of the tree structure, the branches of the tree structure can only be affected by axial pressure. Therefore, the main problem about the tree structure at present is to find the most reasonable stress form through form-finding analysis. At present, the calculation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/13
Inventor 赵中伟羡丽娜简相洋刘海卿吴秀峰李永靖孙庆巍
Owner LIAONING TECHNICAL UNIVERSITY
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