Optimization method for lightweight structure of rod layout and discrete size

By using an improved dual-valued encoding parameterization method and three-dimensional moving point technology, the collaborative optimization of member size and layout is achieved through autonomous selection. This solves the problem of fixed specifications for discretized member sizes in existing truss structures, enabling a lightweight design with higher precision and better performance.

CN122046840BActive Publication Date: 2026-07-07CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Filing Date
2026-04-14
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In existing truss structure optimization, the discretization dimensions of members mostly adopt fixed standard specifications, which lacks flexibility and makes it difficult to adapt to the personalized optimization needs under different working conditions, thus affecting material utilization and structural lightweighting.

Method used

By employing an improved dual-valued parameterization method and three-dimensional moving point technology, the discretized dimensions of the members are autonomously selected to achieve coordinated optimization of member dimensions and layout. The geometric parameters and diameters of the members are updated through finite element analysis and optimization algorithms to avoid member intersections and overlaps and accurately match the structural stress characteristics.

Benefits of technology

It improves material utilization, reduces redundant material consumption, enhances the precision and performance of lightweight truss design, provides more design options, and allows for the rapid selection of optimal member sizes and layouts.

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Abstract

The present application belongs to the technical field of lightweight structure, and particularly relates to a lightweight structure rod layout and discrete size optimization method. The present application is a lightweight design for a three-dimensional structure, adopts point coordinates in a space coordinate system and the number of selected rods to determine the layout form of the three-dimensional structure, the rods are rods with circular cross sections, and then an improved double-value coding parameterization method (referred to as BCP method) is used to determine the diameter size of the selected rods, thereby forming a lightweight structure layout and discrete size optimization design method, so as to facilitate the extraction of geometric parameters of the optimization result, and also facilitate the selection of rods with common regular diameter sizes. The present application avoids the problems of cross overlap between rods, and can provide more design schemes for the optimal rod layout of similar truss structures.
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