During the development phase of a brake system, engineers use more and more simulation tools to help them achieve optimal designs for their products. For the analysis of deformations or high frequency vibrations (squeal) there are different methods one can use in this phase. For vibration problems with lower frequency, hot judder for instance, there are fewer options for an engineer. Most of them are only taking into account the axle/steering components or the brake disc as an isolated component. Based on this discussion, the main focus of this work is to take a look into the brake system as a whole and analyse the influence thereof on hot judder and hot spots. In order to analyse the whole brake system, a model is built to include relevant behaviour of the braking system under previously specified braking conditions. Results from the dynamometer of the TU Darmstadt are used to evaluate the simulation and to identify the relevant braking conditions for hot judder. This leads to the possibility to compare influence of parameters on the most interesting measuring variables. For Hot Judder these variables are temperatures, disk thickness variation (DTV), brake torque variation (BTV) and surface run out (SRO).

Maximilia Könning, Dr. Ronaldo Nunes, Sebastian Fischer, Prof. Dr. Hermann Winner, - Daimler AG, Mercedes-Benz Cars, TU Darmstadt, FZD