Model reduction strategy for railway disc brake squeal prediction
LOYER ; SINOU ; CHIELLO ; LORANG
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
LOYER ; SINOU ; CHIELLO ; LORANG
Résumé / Abstract
Squeal noise is an important industrial issue concerning current transport facilities, especially since environmental policies tend to include noise regulation. Many studies have been carried out on automotive or aeronautic brake systems, but until recently little has been done for railway systems. Prediction of squeal noise and identification of appropriate leverage for its reduction require ability to perform time simulation of industrial representative brake systems. Such simulation requires non-linear transient and stationary dynamics on complex systems involving frictional contact, thus model reduction has to be performed. In this paper different reduction bases are tested on a simple test case exhibiting mode coupling instabilities in order to show what kinds of bases are able to give an accurate prediction of the system vibrations. The choice of the tested bases is mainly governed by the stability analysis of the system i.e. the complex modes describing the behaviour around the equilibrium. Among theses modes the unstable ones are responsible for the occurrence of squeal. Different indicators of quality of the solution are presented in order to motivate a choice of reduction allowing a compromise between solution quality and computational cost. The importance of including modes near the harmonics of the unstable modes in the reduction basis is showed. Key words: Squeal : non-linear dynamics, stability analysis, frictional contact, model reduction.
Editeur
GRRT Groupement Régional Nord - Pas de Calais pour la Recherche dans les Transports
