A Time-Domain Model for High-Frequency Wheel/Rail Interaction Including Tangential Friction

Astrid Pieringer (1) , Wolfgang Kropp (1)

1 Division of Applied Acoustics / CHARMEC

Lateral forces due to frictional instability are seen as the main reason for the occurrence of curve squeal. Predicting squeal requires thus to describe the high-frequency wheel/rail interaction during curving including the coupling between vertical and lateral directions. In this paper, a time domain approach is presented which includes both vertical and lateral forces and takes into account the non-linear processes in the contact zone. Track and wheel are described as linear systems using impulse response functions that can be pre-calculated. The non-linear contact model is based on an influence function method for the elastic half-space and a characteristic function for the friction coefficient. First results from the interaction model including tangential friction are presented in order to demonstrate the functioning of the approach.

Keywords: Dynamic wheel/rail interaction; Time-domain modelling; Tangential friction; Curve squeal

Domains: Acoustics [physics.class-ph]; Acoustics [physics.class-ph]

Astrid Pieringer, Wolfgang Kropp. A Time-Domain Model for High-Frequency Wheel/Rail Interaction Including Tangential Friction. 10ème Congrès Français d'Acoustique, Apr 2010, Lyon, France. ⟨hal-00541723⟩