Structural optimization of asymmetric brake rotors for the separation of their eigenfrequencies

Andreas Wagner, TU Darmstadt

4 Apr 2013, 17:00; Location: S4|10-1

Suppression of brake squeal has received a lot of attention by engineering researchers in the past. It is widely accepted in the scientific community that the self-excited vibrations induced by the frictional contact between brake disc and brake pad are the main cause of brake squeal. Presently, a variety of methods are being discussed to avoid squealing, e.g. the introduction of damping or the active suppression of the resulting vibrations. Especially in the automotive industry passive measures for squeal avoidance are preferred to active ones due to lower costs and higher reliability. One promising passive approach is the introduction of asymmetry to the brake rotor, which has experimentally and mathematically been proven to avoid squeal.

This talk will focus on the design, modeling and optimization of such asymmetric brake rotors. An asymmetric brake rotor exhibits a separation of its eigenfrequencies known to have a stabilizing effect leading to a reduction in squeal affinity of the brake system. In order to introduce an appropriate separation of eigenfrequencies it is necessary to conduct a structural optimization of the brake disc with the requirement to allow for large changes in the geometry. While many commonly used modeling techniques require frequent remeshing of the structure to be optimized, a new modeling approach, which avoids this cumbersome remeshing process, is presented. This provides an efficient basis for the structural optimization of the brake rotors. Furthermore, a promising comparison between theoretical results and tests with prototype brake discs will be shown. Finally, the talk will be concluded with an overview over further applications of the presented modeling and optimization approach.

Category: CE Seminar


Technische Universität Darmstadt

Graduate School CE
Dolivostraße 15
D-64293 Darmstadt

Phone+49 6151/16-24401
Fax -24404

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