A coupled track-train-seat-human model with lateral, vertical and roll vibrations was developed to investigate the ride comfort of high-speed trains. The ride comfort was assessed by the total equivalent acceleration defined according to ISO 2631-1. It was found that the track flexibility had a minor influence on the lateral, vertical and roll floor vibrations below 20 Hz, while the total equivalent acceleration was overestimated by over 10% at high speed using a rigid track. The flexibility of the carbody generated dramatic floor vibration in lateral, vertical and roll directions above 7.5 Hz, so the rigid carbody model significantly underestimated the total equivalent acceleration. The total equivalent acceleration tended to increase with the increase of speed. The equivalent accelerations for two symmetric seat positions illustrated analogous trends with the increasing speed. The ride comfort was the worst close to the carbody ends, followed by the carbody centre at high speed. The vertical acceleration on the seat pan was the most severe whatever the seat position and speed are. The neighbouring subject brought about a reduction of the total equivalent acceleration for the subject under evaluation. The carbody damping can reduce the total equivalent acceleration effectively in the whole speed range.
Modelling and ride comfort analysis of a coupled track-train-seat-human model with lateral, vertical and roll vibrations
Vehicle System Dynamics ; 60 , 9 ; 2988-3023
02.09.2022
36 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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