A parametric study on the structural noise radiation characteristics of a steel spring floating slab track

• Published in: Advances in mechanical engineering Vol. 14; no. 9
• Main Authors: Zhou, Qing, He, Yuanpeng, Li, Muxiao, Liu, Zhe, He, Yulong, Sheng, Xiaozhen
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.09.2022; Sage Publications Ltd; SAGE Publishing
• Subjects: Boundary element method; Field tests; Irregularities; Mathematical models; Model testing; Noise control; Parameters; Parametric statistics; Passenger comfort; Periodic structures; Prediction models; Radiation; Railway tracks; Slabs; Steel; Vibration analysis; Interior noise; Acoustic boundary clement; Steel spring floating slab track; infinitely long periodic structure model
• ISSN: 1687-8132; 1687-8140
• DOI: 10.1177/16878132221119921

It is a common experience that the interior noise of an underground train vehicle increases suddenly when it just runs into a track section with steel spring floating slabs, significantly reducing passengers’ comfort. This paper investigates the reasons, and control, of such noise through field tests and model simulations. The effect of rail surface irregularity on interior noise was investigated first by analysing data collected from interior noise tests, rail surface irregularity measurement and by analysing the modal behaviour of the slab. Noise radiation of the track slab was then analysed using the acoustic boundary element method while the vibration of the steel spring floating slab track is predicted based on an infinitely long periodic structure model; And finally with the prediction models, a parameter study was performed for the steel spring floating slab, on the purpose of improving the parameters to make the track less noisy. The research presented in this paper may provide a reference for the design of steel spring floating slabs in terms of noise control.