Full-scale design method of multi-porous stiffened shell based on multi-piece equal geometry topology optimization

By using a multi-slice geometric topology optimization method, combined with Bézier extraction technology and solid-shell coupling elements, the limitations of existing technologies in the stiffening design of thin shell structures with complex geometries are overcome. This achieves highly robust optimization of porous stiffened shells, improving design freedom and accuracy.

CN120068303BActive Publication Date: 2026-04-07HUAZHONG UNIV OF SCI & TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing optimization methods are limited to the stiffening design of cylindrical shells and cannot be effectively applied to thin-shell structures with complex geometries, thus restricting design freedom.

Method used

A multi-sheet equal geometric topology optimization method is adopted. By constructing a high-order NURBS element mesh, combining Bézier extraction technology and solid-shell coupled elements, displacement penalty terms and rotation penalty terms are introduced, and local volume constraints are applied to construct a full-scale porous stiffened shell optimization model.

Benefits of technology

It achieves efficient and high-precision stiffening layout optimization for thin-shell structures with complex geometries, resulting in highly robust porous stiffened shells with high design freedom and wide applicability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120068303B_ABST
    Figure CN120068303B_ABST
Patent Text Reader

Abstract

This invention belongs to the field of structural optimization technology. It discloses a full-scale design method for porous stiffened shells based on multi-piece isogeometric topology optimization. The steps are as follows: (1) Divide the thin shell structure and the stiffening region into high-order NURBS element meshes respectively; (2) Use isogeometric Kirchhoff-Love shell elements to describe the thin shell structure and three-dimensional solid elements to describe the stiffening region. Decompose the high-order NURBS element mesh into Bézier elements, and then construct solid-shell coupled elements; (3) Set the equivalent density as a design variable on each solid element. Transform the design variable into the equivalent density on the control points of the thin shell by applying mapping constraints. At the same time, introduce local volume constraints on the design variable to obtain bone-like porous stiffening, and then construct a full-scale multi-piece isogeometric topology optimization model for porous stiffened shells, and finally obtain the optimized porous stiffened shell structure. This invention improves applicability.
Need to check novelty before this filing date? Find Prior Art