Design of cellular stiffened shells via full-scale multi-patch isogeometric topology optimization based on Bézier extraction

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-20 DOI:10.1016/j.tws.2025.113210

Mingzhe HUANG , Mi XIAO , Huidong HUANG , Liang GAO , Xuan WU

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引用次数: 0

Abstract

In this paper, a full-scale multi-patch isogeometric topology optimization (ITO) method based on Bézier extraction is proposed for design of cellular stiffened shells. The isogeometric Kirchhoff–Love shell model based on Bézier extraction is established for efficient performance analysis of the thin-shell. An isogeometric solid-shell coupling method is developed for structural analysis of stiffened shells. The penalty method is employed to ensure displacement and rotation continuity at the interfaces between adjacent NURBS patches. The stiffener layout on thin shell is represented by setting an effective density field on control mesh. A mapping constraint is adopted to avoid stiffeners with overhanging features for ease of manufacturing. Bone-like cellular stiffeners are obtained by imposing local volume constraints at each control point. In order to reduce the loss of the stiffness performance caused by local volume constraints, an adaptive allocation strategy is developed, i.e., the influence radius of local volume constraints is adaptively scaled based on the displacement field solved at each iteration. It is demonstrated through several numerical examples that the proposed method can efficiently design cellular stiffened shells with high stiffness and damage robustness.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.