Noise and vibration mitigation for rail transportation systems proceedings of the 13th International Workshop on Railway Noise, 16-20 September 2019, Ghent, Belgium - Degrande, Geert; Lombaert, Geert; Anderson, David; de Vos, Paul; Gautier, Pierre-Etienne; Iida, Masanobu; Nelson, James Tuman; Nielsen, Jens C. O.; Thompson, David J.; Tielkes, Thorsten; Towers, David A. (Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 2021)