An Analytical Study in Multi-physics and Multi-criteria Shape Optimization

Hanno Gottschalk () and Marco Reese ()
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Hanno Gottschalk: University of Wuppertal
Marco Reese: University of Wuppertal

Journal of Optimization Theory and Applications, 2021, vol. 189, issue 2, No 7, 486-512

Abstract: Abstract A simple multi-physical system for the potential flow of a fluid through a shroud, in which a mechanical component, like a turbine vane, is placed, is modeled mathematically. We then consider a multi-criteria shape optimization problem, where the shape of the component is allowed to vary under a certain set of second-order Hölder continuous differentiable transformations of a baseline shape with boundary of the same continuity class. As objective functions, we consider a simple loss model for the fluid dynamical efficiency and the probability of failure of the component due to repeated application of loads that stem from the fluid’s static pressure. For this multi-physical system, it is shown that, under certain conditions, the Pareto front is maximal in the sense that the Pareto front of the feasible set coincides with the Pareto front of its closure. We also show that the set of all optimal forms with respect to scalarization techniques deforms continuously (in the Hausdorff metric) with respect to preference parameters.

Keywords: Shape optimization; Multi-criteria optimization; Multi-physics; 49Q10; 74P10; 90C29 (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s10957-021-01841-y

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