Groth, CorradoGuarino, RobertoSedlak, KamilBiancolini, Marco Evangelos2023-02-272023-02-272023-02-272023-01-1210.1016/j.fusengdes.2023.113418https://infoscience.epfl.ch/handle/20.500.14299/195196WOS:000924626200001The Cold Mass Support (CMS) is a basic structural component of the feeder system of the EU DEMO tokamak. The function of this structural element is not only to provide support to the containment duct - wiring the cryogenic lines, electrical bus bars and instrumentation to the magnets - in terms of both gravity loads and Lorentz forces, but also to isolate the low-temperature elements from the ambient, minimising the (conductive and radiative) heat loads. In this work, we describe a simulation and optimisation procedure adopted for the preliminary design of the EU DEMO CMS, which makes use of finite-element analyses and a shape parameterisation based on Radial Basis Functions (RBF). Structural and thermal numerical grids are morphed from a baseline configuration, and complex shape variations are achieved by means of an advanced meshless procedure based on CAD parametric surfaces, respecting the given geometrical constraints. A response surface-based optimisation is finally performed, in order to obtain a preliminary CMS candidate able to fulfil both structural and thermal targets.Nuclear Science & Technologyeuropean demofeederscold mass supportnumerical simulationsoptimisationrbffemdata approximation schememultiquadricstext::journal::journal article::research article