Topology optimization for stability problems of submerged structures using the TOBS method

Autor(es)

Mendes, E. ^[1] ; Sivapuram, R. ^[2] ; Rodriguez, R. ^[3] ; Sampaio, M. ^[4] ; Picelli, R. ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Mech Engn, Escola Politecn, Av Prof Mello Moraes 2231, BR-05508030 Sao Paulo, SP - Brazil

^[2] Univ Calif San Diego, Struct Engn Dept, 9500 Gilman Dr, San Diego, CA 92093 - USA

^[3] Univ Fed Santa Maria, Dept Mech Engn, Av Roraima, BR-97105900 Santa Maria, RS - Brazil

^[4] Univ Sao Paulo, Dept Min & Petr Engn, Escola Politecn, Praca Narciso de Andrade S-N, BR-11013560 Santos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COMPUTERS & STRUCTURES; v. 259, JAN 15 2022.
• Citações Web of Science: 0

Resumo

Structural optimization is increasingly used across academia and industry because of the great design freedom it offers and due to the increasing availability of computational power. In this context, binary methods which generate clear (0/1) designs are an effective approach to solve optimization problems, especially multiphysics, wherein precise definition of the structural boundary is essential. This work adopts the Topology Optimization of Binary Structures (TOBS) method to solve structural optimization problems that consider buckling constraints and design-dependent loads, such as fluid pressure loading, a characteristic of submerged structures. Buckling constrained TO problems applied to design-dependent loads are not yet explored in the literature. Few optimization problems are investigated to demonstrate the effect of the buckling constraint on the optimized solutions as compared to that of the classical compliance minimization problem. The common issues associated with the eigenproblem characteristic of the buckling phenomenon are discussed. The method successfully considers design-dependent loads coupled with stability constraints, obtaining final solutions with significant improvement in buckling resistance and minimal stiffness loss when compared to the compliance design. It is concluded that the TOBS method presented promising results and potential application in stability problems of design-dependent loaded structures, such as those present in the offshore industry. (c) 2021 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 19/06985-5 - Otimização topológica com variáveis binárias
• Beneficiário: Eduardo Aguiar Mendes
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 18/05797-8 - Abordando desafios de projeto de estruturas offshore através de otimização topológica multifísica
• Beneficiário: Renato Picelli Sanches
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores