Three-dimensional topology optimization of a fluid–structure system using body-fitted mesh adaption based on the level-set method
2021; Elsevier BV; Volume: 101; Linguagem: Inglês
10.1016/j.apm.2021.08.021
ISSN1872-8480
AutoresHao Li, Tsuguo Kondoh, Pierre Jolivet, Kozo FURUTA, Takayuki Yamada, Benliang Zhu, Kazuhiro IZUI, Shinji Nishiwaki,
Tópico(s)Advanced Mathematical Modeling in Engineering
ResumoWe propose a new framework for the two- and three-dimensional topology optimization (TO) of the weakly-coupled fluid–structure system. The proposed design methodology uses a reaction–diffusion equation (RDE) for updating the level-set function based on the topological sensitivity. From the numerical point of view, two key ingredients are highlighted: (i) the body-fitted adaptive mesh strategy allows the disjoint reunion of a global mesh that contains several (fluid/solid) subdomains, whose interfaces can be described by an implicitly defined surface (zero level-set); (ii) our framework uses FreeFEM for finite element analysis (FEA) and PETSc for distributed linear algebra. Efficient preconditioner techniques are utilized to solve the large-scale finite element systems. From the engineering stand point, we propose a complete product development workflow including the pre-processing, TO, B-Rep conversion, and the numerical experiment. The performance of our methodology is demonstrated by solving three different optimization problems: compliance, power dissipation, and fluid–structure interaction (FSI). For comparison and for assessing our various techniques, we benchmark our designs against state-of-the-art works followed by showcasing a variety of practical engineering design examples.
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