Investigation of Wagon Derailment Moving on Cable-StayedBridge Due to Rail Irregularities

Rail profile irregularities are one of the main vibration sources to vehicle and track. In this paper derailment of a wagon moving on cable-stayed bridge due to rail irregularities is investigated. The four-axle wagon model is a three-dimensional, non-linear model of a train freight car with 38 DOF. Two parallel rails of the track are modeled as Euler-Bernoulli beams on elastic points as rail pads. The bridge deck is modeled as a plate supported by some cables. Using this model; the effects of wagon specifications, lateral position of the rails and rail irregularities on wagon derailment have been studied.