Three-dimensional structural topology optimization of aerial vehicles under aerodynamic loads. (English) Zbl 1391.76269
Summary: A previously developed density distribution-based structural topology optimization algorithm coupled with a Computational Fluid Dynamics (CFD) solver for aerodynamic force predictions is extended to solve large-scale problems to reveal inner structural details of a wing wholly rather than some specific regions. Resorting to an iterative conjugate gradient algorithm for the solution of the structural equilibrium equations needed at each step of the topology optimizations allowed the solution of larger size problems, which could not be handled previously with a direct equation solver. Both the topology optimization and CFD codes are parallelized to obtain faster solutions. Because of the complexity of the computed aerodynamic loads, a case study involving optimization of the inner structure of the wing of an unmanned aerial vehicle (UAV) led to topologies, which could not be obtained by intuition alone. Post-processing features specifically tailored for visualizing computed topologies proved to be good design tools in the hands of designers for identifying complex structural components.
MSC:
| 76G25 | General aerodynamics and subsonic flows |
| 74F10 | Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.) |
| 74P15 | Topological methods for optimization problems in solid mechanics |
| 76M25 | Other numerical methods (fluid mechanics) (MSC2010) |
| 65Y05 | Parallel numerical computation |
Keywords:
structural topology optimization; aerial vehicle structural design; parallel CFD; mesh coupling; code coupling; parallelized solversReferences:
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