Time simulation of squeal phenomena in realistic brake models

Overview & Synopsis

This paper presents a modeling strategy employed to obtain converged results on long time simulation of complex finite element brake models. First a novel reduction method, adapted to models showing large interface DOF, is presented. The small finite element area in the vicinity of the contact is treated as fully non-linear and the remaining of the structure is represented by a superelement. The method is thus suited for large finite element models. A time integration scheme, based on a non-linear Newmark, is then adapted to allow large models to be computed over long time periods. This is achieved mainly by the use of a fixed iteration operator throughout the simulation. This technique is applied first to a simplified brake model for validation purposes, then to a state-of-the-art brake model designed by Bosch Chassis Systems Brakes. The simulation results are put in perspective with recent publications on the subject.