Generation of ground structures for 2D and 3D design domains

Smith, Ole P Pereira Da Silva

doi:10.1108/02644409810219820

Cited by 14 publications

(3 citation statements)

References 3 publications

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“…e former method has been successfully applied to tower structures, e.g. [25][26][27], though dictates a design of lattice like members. e SIMP approach has seen use for tower-like structures [26,28] and will be used here.…”

Section: Cableway Pylonmentioning

confidence: 99%

The Influence of Uncertain Loading on Topology-Optimized Designs

Hofer

Wehrle

2022

Mathematical Problems in Engineering

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The design of structures using topology optimization can improve the structural performance and save material, in turn reducing costs. Using a framework of large-scale, three-dimensional topology optimization implemented by the authors in an open-source multiphysical software, we investigate the influence of uncertain loading on the optimized design. Direct differentiation is used to reveal the relationship between displacements and applied force, giving an efficient and effective tool to postprocess optimized topologies. The developed methodology for the assessment of the sensitivity with respect to applied forces is explored using two three-dimensional examples: the classic MBB cantilever and a cableway pylon. The advantages and limitations of this method are discussed.

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Section: Cableway Pylonmentioning

confidence: 99%

The Influence of Uncertain Loading on Topology-Optimized Designs

Hofer

Wehrle

2022

Mathematical Problems in Engineering

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“…The generation of the initial ground structure is a crucial aspect of the GSM. For example, Smith (1998) proposed an approach that employs unstructured grids to represent the design domain; however, the approach requires additional preprocessing steps, including the decomposition of design elements and the generation of boundary faces. Other studies (Rule 1994;McKeown 1998;Martinez et al 2007;Hagishita and Ohsaki 2009) proposed growing methods that tend to use a small size of the initial ground structure, but the size of the structure later needs to be expanded during the optimization.…”

Section: Introductionmentioning

confidence: 99%

Macroelement and Macropatch Approaches to Structural Topology Optimization Using the Ground Structure Method

et al. 2016

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Topology optimization can be divided into continuum and discrete types, the latter being the emphasis of the present work. In the field of discrete structural topology optimization of trusses, the generation of an initial ground structure is crucial. Thus, this paper examines the generation of ground structures for generic structural domains in two and three dimensions. It compares two methods of discretization, Voronoi-based and structured quadrilateral discretizations, and proposes two simple and effective ground structure generation approaches: the macroelement and macropatch approaches. Both can be implemented with either type of discretization. This work presents several features of these approaches, including the efficient generation of initial ground structures, a reduction in matrix bandwidth for the global stiffness matrix, finer control of bar connectivity, and a reduction in the number of overlapped bars. Generic examples and practical structural engineering designs are presented. They display the features of the proposed approaches and highlight the comparison with results from either the literature, the traditional ground structure generation, or the continuum optimization method.

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“…O modelo Grua 1 foi analisado Smith (34,6), com o domínio sendo apresentado na Figura 5.6(a). A Figura 5.6(b) apresenta o resultado com a geração de malha e otimização sendo executadas pelo GRAND e as Figuras 5.6(c) e 5.6(d) mostram os resultados com a geração de malha densa desta dissertação, com o otimizador do GRAND e com a implementação no TopSim, respectivamente.…”

Section: Modelo Gruaunclassified

Sistema Eficiente De Otimização Topológica Estrutural Utilizando O Método De Malha Densa De Barras

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Ao meu orientador Waldemar Celes, por toda sua atenção e paciência ao longo de todos os anos como meu professor, sempre confiando em meu potencial.Ao professor Ivan Menezes, por sua simpatia, me motivando e ajudando com as dúvidas que tive durante a pesquisa.À minha companheira Raphaela Curvão, por seu carinho, apoio e incentivo durante todo este trabalho, sempre estando ao meu lado.Aos meus pais, Roberto Tavares e Ana Célia Gama, e à minha irmã, Fernanda Tavares, por todo o suporte que me dão e a dedicação que possuem comigo.Aos meus colegas do Tecgraf, em especial a Rodrigo Espinha, Leonardo Duarte, Alice Herrera e Vicente Neto, por me ajudarem em várias etapas desta pesquisa.Ao CNPq, ao Tecgraf e à PUC-Rio, pelos auxílios concedidos, sem os quais este trabalho não poderia ter sido realizado.

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Generation of ground structures for 2D and 3D design domains

Cited by 14 publications

References 3 publications

The Influence of Uncertain Loading on Topology-Optimized Designs

The Influence of Uncertain Loading on Topology-Optimized Designs

Macroelement and Macropatch Approaches to Structural Topology Optimization Using the Ground Structure Method

Sistema Eficiente De Otimização Topológica Estrutural Utilizando O Método De Malha Densa De Barras

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