Research on the Influence of Brake Control on the Longitudinal Impulse of Existing 20000-Ton Heavy-Haul Train
To analyze the impact of different braking controls on the longitudinal impulse of the existing 20000-ton heavy-haul train,a longitudinal dynamic model of a 20000-ton heavy-haul train is established in MATLAB based on the theories of longitudinal dynamics and vehicle dynamics.In this model,the relevant factors of train longitudinal motion,including the traction and dynamic braking characteristics of the locomotive,the air braking system of the train and the characteristics of the coupler-buffer device are taken into account.The effects of line conditions,air braking pressure,synchronous control delay,the electric braking force of the locomotive and other parameters on the longitudinal impulse of the 20000-ton heavy-haul train are analyzed.The analysis results indicate that the line conditions of steep to gentle slopes have the most significant impact on the longitudinal impulse when the 20000-ton heavy-haul train employs braking.And the coupler compressive forces would increase with the increase of the slope difference.The synchronous control delay and the electric braking force of the locomotive have a significant impact on the longitudinal impulse of the 20000-ton heavy-haul train during braking.The longitudinal impulse would reduce with the decrease of the synchronous control delay and the electric braking force.And controlling the longitudinal coupler force within a safe range can enhance the safety of the vehicle operation.The result provides significant theoretical support and practical guidance for optimizing the braking strategies of heavy-haul trains.
20000-ton heavy-haul trainlongitudinal impulseair brakingsynchronous control delaydynamic brakingdynamic performance
万方数据
维普
