Influence of the ground/structure interaction on the calculation of the force at the wheel/rail contact
Paper in proceedings, 2016

The prediction of ground vibration from railway traffic represents a major challenge for railway operators, especially with regard to the increasing number of new lines built close to residential buildings. In this context, it becomes essential to have a model that accounts on the one hand for ground/structure interaction and on the other hand for wheel/rail interaction. In this paper, such a model is developed by combining two existing models. The model for ground/structure interaction, SIPROVIB, is an analytical model of a slab with Kirchhoff-Love hypothesis coupled to the ground in 3D. The model for wheel/rail interaction is a computationally efficient time-domain model, where vehicle and track are represented by pre-calculated Green's functions. The wheel/rail contact is modelled as 3D, non-linear and non-Hertzian. Both models are combined by replacing the track Green's function by a Green's function representing the ground and slab coupled to a simplified rail model. Numerical results showed that the influence of slab and ground on the dynamic wheel/rail contact forces increases for thinner slabs and softer grounds, but is generally of secondary importance. Deviations in contact force did not exceed 2 dB for frequencies up to 200 Hz. © 2016, German Acoustical Society (DEGA). All rights reserved.

Wheel/rail interaction

Ground/slab interaction

Contact force

Author

Loïc Grau

ACOUPHEN

Astrid Pieringer

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

Bernard Laulagnet

Laboratoire Vibrations Acoustiques

Wolfgang Kropp

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future

2086-2097

Subject Categories

Fluid Mechanics and Acoustics

More information

Latest update

11/21/2018