Estimation of Stability of Railway Flat Cars with Various Types of Running Gear Against Derailment

Issue related to ensuring safety of technical operation of fl at cars for high speed containerized transportation by way of using new types of running gear is considered in the paper. Because of principal drawbacks of widely used bogies of freight cars possible use of axle box suspension bogies is considered for the equipment of high speed fl at cars. Taking into consideration highly effi cient application of mathematic simulation for the determination of dynamic performance of railway cars appropriate computer models were developed for the estimation of the conditions related to ensuring safe motion of fl at cars. It was revealed as result of the simulation that in case of stability of wheelsets against derailment condition of safe operation of a fl at car equipped with axle box suspension bogies is satisfi ed at travel speeds up to and including 150 km/h whereas safe travel of a fl at car equipped with conventional bogies is ensured at travel speeds up to but 100 km/h. Th is conclusion gives bases to recommend equipment of fl at cars for high speed containerized transportation with axle box suspension running gear.