© 2020 IIETA. This article is published by IIETA and is licensed under the CC BY 4.0 license (http://creativecommons.org/licenses/by/4.0/).
OPEN ACCESS
Noise is a significant environmental problem in railway transportation systems. The rail transport policy of the EU and Switzerland is asking for efficient, innovative track systems, which are able to reduce rail noise. A project named OST funded by BAFU Switzerland was carried out under the co-operation with Empa (Switzerland), Technical University of Munich and Technical University of Berlin, had the target to develop a numerical model to predict the noise and vibration of ballasted track caused by passing trains. A co-simulation chain for transient acoustic simulation between multi body simulation (for structure-borne vibration) and finite element simulation (for sound radiation and for air-borne sound propagation) was established and the interface was developed. The numerical model was validated through laboratory tests on the test track of Technical University of Munich and field measurements on the track section Rothenthurm in Switzerland. The model aims to predict the acoustic effect of different railway superstructure components such as different sleeper types, rail profiles and rail pad stiffness.
3D-modelling, air-borne noise propagation, co-simulation, finite element method, low-noise ballasted track, modal analysis, multibody simulation, rail-wheel contact, structure-borne vibration, vehicle-track interaction
[1] Freudenstein, S., Zhang, J. & Mack, J., Modularer Workflow zur Modellierung der Dynamik von Oberbausystemen und dessen Validierung. ZEVrail, Ausgabe 04/2018, S. 132–137, 2018.
[2] Hecht, M., Sohr, S., Zhang, J., Lechner, B., Gwenael, H., Zemp, A. & Wunderli, J., Entwicklung eines Simulationstools zur Auslegung lärmarmer Gleiskonstruktionen. ZEVrail, Ausgabe 10/2018, S. 400–409.
[3] Zhang, J., Lechner, B., Freudentstein, S., Sohr, S., Hecht, M., Wunderli, A., Zemp, A. & Gwenael, H., Entwicklung eines Oberbaukörperschallmodells. Der Eisenbahn Ingenieur, Ausgabe 03/2019, S. 9–14.
[4] Zhang, J. & Mack, J., Research Report 3493: Field Measurement at Rothenthurm (CH) for Input Data of Simulation Model and Model Validation (14th of Nov. 2016).