Ground vibration force generated by rail vehicles and track are usually characterized by one-third octave band force density levels (FDL) in North America. The FDLs depend on a wide variety of vehicle and track characteristics. FDL data measured over several years showed that the FDLs increased substantially between 40 and 100 Hz at two test sites at the Sound Transit system within a period of three years. FDLs at a third site did not change at those frequencies over a longer period. No noticeable differences in rail roughness were measured. However, differences in rail wear and lubrication existed between the three sites. The FDLs between 40 and 125 Hz were lower after grinding to correct the rail profile and remove grinding-induced corrugation (GIC) from earlier grinding. The track geometry of the test sites appeared to influence the speed dependencies of the FDLs.
Increase in Force Density Levels of Light Rail Vehicles
Notes Numerical Fluid Mech.
Noise and Vibration Mitigation for Rail Transportation Systems ; Kapitel : 49 ; 462-469
2021-04-09
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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