In this investigation, a systematic and automated procedure that can be used for modeling vehicle/turnout interactions is developed. Since cross-sectional shapes of tongue rails of turnout are continuously changed along the track to achieve smooth transfer of contact in point section, highly nonlinear wheel/rail contact dynamics, which involves wheel flange impact and multiple contacts, needs to be carefully handled in the dynamic simulation. To this end, contact geometry analysis procedure is generalized for turnout simulations such that tongue rail profiles available from measurement and/or drawing can be automatically interpolated and used for providing multiple look-up contact tables. Having obtained multiple look-up contact tables, the wheelset trajectory coordinate is used to locate the nearest look-up contact tables to be interpolated for determining the location of contact point at every time-step in the dynamic analysis. Several numerical examples are presented in order to demonstrate the use of the procedure developed in this investigation for multibody dynamic simulations of vehicle/turnout interactions.
Wheel rail contact dynamics of turnout negotiations in the analysis of multibody railroad vehicle systems
2010
11 Seiten, 16 Bilder, 11 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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