Wheel/rail interactions and aerodynamic fluctuations are the important sources of wayside noise produced by high-speed railway trains. The dominance of one or the other of these sources depends entirely on the relative effectivenss of each in generating radiated noise. Equations are given for the calculation of both the wheel/rail and aerodynamic noise levels and their predictions are compared to peak noise levels measured during the passage of conventional fast trains, new high-speed trains, and magnetically levitated vehicles. For the quietest new trains built with state-of-the-art technology, the analysis presented indicates that aerodynamic fluctuations can become the dominant source of wayside noise at vehicle speeds between 250 and 300 km/h (155 and 187 mph).
Prediction of Aerodynamic and Wheel/Rail Noise Generated by High-Speed Trains
1977
34 pages
Report
Keine Angabe
Englisch
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