Passenger rail vehicle safety assessment methodology. Volume I, Summary of safe performance limits.
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2000-04-01
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Abstract:This report presents a methodology based on computer simulation that asseses the safe dyamic performance limits of commuter passenger vehicles. The methodology consists of determining the critical design parameters and characteristic properties of both the vehicle and the track, establishing the faliure modes, and then using a computer model to determine under what conditions the failure occurs. The computer tool predicts the dymanics of the vehicles at varying speeds and safety limits and margins are established based on when the predicted behavior approaches a derailment.
This report also present numerical examples of this methodology that were produced using the software tool OMNISIM to predict the response of single and bi-level vehicles as they negotiate both tangent tracks and tracks with curves up to 20 Deg. Imperfections auch as cusps, misalignments, and switch points are simulated to determine conditions of unsafe vehicle behavior.
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