Multi-references acquisition strategy for shape optimization of disc-pad-like mechanical systems

Abstract

We expose an efficient strategy to deal with shape optimization of dynamical systems exhibiting flutter-type instability induced by friction, such as the considered disc-pad system. The stability of such systems can be analysed through Complex-Eigenvalue Analysis, through which we present a squeal noise criterion to be minimized as a computationally expensive blackbox function. The computational domain is discretized through Isogeometric formulation for its advantages in optimization and superior approximation properties which are well studied in structural dynamics. To be computationally efficient with the expensive black-box function, we defined the optimization based on Efficient Global Optimization scheme in the context of multi-objective optimization, with the integration of Isogeometric designthrough-analysis methodology. As gradient information is hard to access for such black-box functions, in addition to the presence of constraints, we relied

Modelling Friction-Induced Dynamic Instability Dedicated for Isogeometric Formulation

“…Tis could be useful in applications such as optimization of systems for friction-induced dynamic instability through numerical simulations. Tis is mainly evident in the shape optimization of the contact interface itself [24,25] since the contact interface has to be modelled numerically independent of experiments for a given shape variation in optimization, given the necessary experimental inference initially, parameters inferred to model normal compliance for example.…”