Estimation of nonlinearities in the wheel-rail rolling noise generation process
2014 (English)In: Proceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics, 2014, 3485-3496 p.Conference paper (Other academic)
The dynamics of wheel-rail interaction is predicted using a time-domain rolling contact model and a state-dependent method to model nonlinear contact forces in the wheel-rail interaction. Contact stiffness and contact filters are pre-calculated as functions of the vertical wheel-rail relative displacement (state-dependency) using three-dimensional surface data in quasi-static contact computations. By including the state-dependent functions in time-domain prediction of wheel-rail interaction, a computationally efficient method to include nonlinear effects is obtained. Results from predictions of contact forces as well as rail vibrations are presented for two conditions; first, both wheel and rail have surface roughness of broadband character and secondly, a rail corrugation is simulated by superimposing a sinusoidal component on the broadband rail roughness. For a train speed of 200 kph, the contact forces and the dynamic response of the rail exhibit nonlinear contact conditions for both the broadband roughness case as well as for the case where a rail corrugation is simulated.
Place, publisher, year, edition, pages
2014. 3485-3496 p.
IdentifiersURN: urn:nbn:se:kth:diva-155196ISI: 000352201004026ScopusID: 2-s2.0-84913528676ISBN: 978-907380291-9OAI: oai:DiVA.org:kth-155196DiVA: diva2:760116
26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014, Leuven, Belgium, 15-17 September 2014
QC 201505122014-11-032014-11-032015-05-12Bibliographically approved