Publicaties
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Compliance-based topology optimization of structural components subjected to thermo-mechanical loading Universiteit Gent
Apart from mechanical actions, structural components in the construction industry may be subjected to a thermal gradient, causing (internally) restrained thermal expansion. These thermal loads can alter the mechanical response of components in a structural topology optimization procedure. Therefore, the influence of thermal loading should be considered in the sensitivity analysis to efficiently update the structural layout of material. In this ...
Discrete topology optimization – Connectivity for gridshells Vrije Universiteit Brussel
A cluster of canopies is to be designed for a science park. We propose steel gridshell typologies for this purpose. Each typology spans an area of 24x24m. One structural typology will be supported on all four sides, one on two and one on three sides of the square base, with large openings on the free edges of the canopy. Each canopy should have a total height of 5 m and the openings should provide at least 12x3m of unobstructed access. The grid ...
Different approaches for topology optimization of building structures subjected to thermo-mechanical loads due to fire Universiteit Gent
Building structures are designed to withstand a lot of different actions. Apart from mechanical loading (service loads, self-weight, etc.), the structural behavior can be affected by thermal loading as well, such as seasonal temperature fluctuations or accidental fire loads. As a consequence of the large temperature gradient imposed on the structure, fire loading can cause severe structural damage if the structure is not designed accordingly. ...
A unified stochastic framework for robust topology optimization of continuum and truss-like structures Vrije Universiteit Brussel
In this paper a framework is introduced for robust structural topology optimization for 2D and 3D continuum and truss problems. The uncertain material parameters are modelled using a spatially correlated random field which is discretized using the Karhunen-Loève expansion. Spectral stochastic finite element method is used, with a polynomial chaos expansion to propagate uncertainties on the material characteristics to the response quantities. In ...
Robust topology optimization of 2D and 3D continuum and truss structures using a spectral stochastic finite element method Vrije Universiteit Brussel
In this paper a framework is introduced for robust structural topology optimization for 2D and 3D continuum and truss problems. Spectral stochastic nite element method is used, with a polynomial chaos expansion to propagate uncertainties on the material characteristics to the response quantities. The uncertain parameters are modelled using a spatially correlated random eld which is discretized using the Karhunen-Loeve expansion. Special ...
Robust topology optimization of truss structures with random loading and material properties: A multiobjective perspective Vrije Universiteit Brussel
In this paper an approach to robust topology optimization for truss-like structures with material and loading uncertainties, and discrete design variables, is investigated. Uncertainties on the loading direction and magnitude, as well as spatially correlated material stiffness, are included in the problem formulation using spectral stochastic finite element analysis, taking truss element length into account in the uncertainties on the material ...
Multicriteria topology optimization of truss structures with kinematic stability repair Vrije Universiteit Brussel
A novel approach is used to improve the performance and results of the standard multicriteria
genetic algorithms for topology optimization of truss structures. This goal is achieved by
modification of the genetic algorithm (GA), creating a number of kinematically stable individuals
in the initial population, and chromosome repair. The proposed method is developed for both 2D
and 3D structures, producing results which are ...
genetic algorithms for topology optimization of truss structures. This goal is achieved by
modification of the genetic algorithm (GA), creating a number of kinematically stable individuals
in the initial population, and chromosome repair. The proposed method is developed for both 2D
and 3D structures, producing results which are ...
Multiobjective topology optimization of truss structures with kinematic stability repair Vrije Universiteit Brussel
This paper addresses single and multiobjective topology optimization of truss-like structures using genetic algorithms (GA's). In order to improve the performance of the GA's (despite the presence of binary topology variables) a novel approach based on kinematic stability repair (KSR) is proposed. The methodology consists of two parts, namely the creation of a number of kinematically stable individuals in the initial population (IP) and a ...
Symmetry of solu- tions in discrete and continuous structural topology optimization Vrije Universiteit Brussel
In this paper a study is made of symmetry and asymmetry in structural topology optimization with discrete variables. A group theory approach is used to formally de ne the symmetry of the structural problems. This approach allows us to describe the set of symmetric structures and relate it to the entire search space. It is shown that, given a symmetric problem with continuous variables, an optimal symmetric solution (if any) exists. However, it ...