Modelling the acoustic performance of slab tracks
Licentiate thesis, 2020
In this work, a model for the high-frequency vibrations and acoustic radiation of slab tracks has been developed and implemented. The validity of the dynamic model has been tested on a full-scale test rig. The developed model was then used for researching the influence of track parameters on noise emission. In this investigation, the rail pad stiffness was identified to have a major influence. Besides, a model for the sound radiation of railway wheels over hard reflective surfaces was developed, implemented, and validated. The effect of the slab track surface on the radiation efficiency of the vibrating wheel was evaluated and found negligible. The developed models are steps towards predicting the rolling noise generated by rail vehicles on slab tracks, which is significant both for the planning of new lines and the investigation of potential abatement measures.
Chalmers, Architecture and Civil Engineering, Applied Acoustics
Theyssen, J., Pieringer, A. and Kropp, W. The Influence of Track Parameters on the Sound Radiation from Slab Tracks
Fabre, F., Theyssen, J., Pieringer, A. and Kropp, W. Sound Radiation from Railway Wheels including Ground Reflections: A half-space formulation for the Fourier Boundary Element Method
Theyssen, J., Aggestam, E., Zhu, S., Nielsen, J., Kropp, W. and Pieringer, A. Calibration and validation of two dynamic slab track modelling approaches using measurements from a full-scale test rig
Buller från ballastfria spår
Swedish Transport Administration, 2017-01-01 -- 2018-12-31.
Research into enhanced track and switch and crossing system 2 (In2Track-2)
European Commission (Horizon 2020), 2018-11-01 -- 2021-10-31.
Swedish Transport Administration, 2018-11-01 -- 2021-10-31.
Areas of Advance
Fluid Mechanics and Acoustics
Chalmers University of Technology
Sven Hultins Gata 8a
Opponent: Prof. Dr.-Ing. habil Stefan Lutzenberger, Müller-BBM Rail Technologies GmbH, Germany