The Influence of Track Parameters on the Sound Radiation from Slab Tracks
Book chapter, 2021
The influence of track parameters on the sound radiation has so far mainly been studied for ballasted tracks. The increasing usage of slab tracks in new railway lines worldwide makes a review of these parameters relevant. In this paper, the structural vibrations of rail and slab are evaluated based on two waveguide finite element models that are coupled in a finite number of positions. This discretely supported rail is compared to a rail on a continuous support. The sound radiation from rail and slab is evaluated based on a wavenumber boundary element method. The slab and rail contributions are evaluated separately. It is found that comparable to ballasted tracks, the rail pad stiffness has a large influence on the radiated sound power. For a continuously supported rail, the total sound power is reduced and the rail pad stiffness is less influential.
Boundary elements
Discrete coupling
Slab Track
Rail pad stiffness
Infinite waveguide
Sound power
Author
Jannik Theyssen
Chalmers, Architecture and Civil Engineering, Applied Acoustics
Astrid Pieringer
Chalmers, Architecture and Civil Engineering, Applied Acoustics
Wolfgang Kropp
Chalmers, Architecture and Civil Engineering, Applied Acoustics
Notes on Numerical Fluid Mechanics and Multidisciplinary Design
1612-2909 (ISSN) 1860-0824 (eISSN)
Vol. 150 90-97Buller från ballastfria spår
Swedish Transport Administration, 2017-01-01 -- 2018-12-31.
Areas of Advance
Transport
Subject Categories
Applied Mechanics
Infrastructure Engineering
Fluid Mechanics and Acoustics
DOI
10.1007/978-3-030-70289-2_7