Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Effect of physical and optimization parameters on the topology optimization of foundations and buried structures
Submission Author:
Josue Labaki , SP
Co-Authors:
Aldemar Pontes de Siqueira Neto, Renato Picelli, Xiaodong Huang, Josue Labaki
Presenter: Aldemar Pontes de Siqueira Neto
doi://10.26678/ABCM.MECSOL2022.MSL22-0001
Abstract
The topology optimization of the multiphysics problem of soil-structure interaction has a few significant differences from that of classical problems involving bounded, homogeneous domains. Among the most outstanding differences, is that the continuous soil-structure contact interface and the behavior of the soil as an unbounded, flexible medium have a significant impact on the evolution of the iterative optimization procedure and in the resulting optimal topologies. Differently than in bounded-domain problems, evolving topologies of buried structures present varying values of stiffness arising from their contact with the soil, in addition to the stiffness corresponding to the topology of the structure itself. This composition of phenomena causes the optimization algorithm to be significantly more strongly affected by physical and optimization parameters than in classical bounded-domain problems. In this paper, we study the effect of selected parameters in the topology optimization of foundations and buried structures. For this analysis, we use a coupled boundary-finite element model of buried structures, which accurately accounts for the response of the soil as an unbounded medium. The classical Bi-directional Evolutionary Structure Optimization (BESO) method is used to minimize the compliance of the buried structure under prescribed volume restriction. The paper discusses how the size and shape of the initial design volume and soil flexibility affect the optimization process. Under controlled conditions, similarly well-performing local minima can be found, although corresponding to starkly different optimal topologies.
Keywords
Topology optimization, Soil-Structure Interaction, BESO, coupled methods, multiphysics
