Combined Simulation Of Air Brake System And Longitudinal Dynamic Of 20000 Ton Train

This article appears in view of our country Qin Empire line 20,000 ton heavy load train utilization process in breaks the hook and the attrition serious issue,carries out 20,000 ton heavy load train longitudinal dynamics research.First establishes a train longitudinal dynamics analysis model,gives in the longitudinal dynamics analysis formula various parameters computational method,contains the force of traction,the power braking force,the brake shoe friction coefficient,the movement resistance,the slopeway resistance.Aims at specially causes the train longitudinal impulse primary factor----The brake characteristic constant speed question,the use simulation method simulation calculates under under each kind of grouping condition,each kind of brake operating mode brake characteristic.Take the bicycle tentative data as the foundation computation,extracts three kind of buffer characteristics,again each kind of buffer application in train longitudinal dynamics computation.In simulation 20,000 ton train each kind of situation the longitudinal dynamics characteristic,grouping had considered 1 + 2 + 1,2 + 0 + 2,2 + 2 + 3 kind of situations, applied the brake to consider the biggest reduced pressure quantity commonly used brake and the emergency brake,the buffer has considered HM-1,HM-2,the MT-2 three kind of buffers.Has analyzed the HM-1 buffer using the simulation result in three kind of grouping situations,the commonly used brake and in the emergency brake situation vehicle stress on hook stress characteristic and the distribution rule,gave the most large cart stress on hook to have the position.In 2+0+2 grouping situations the most large cart stress on hook distribution is by the front part bearing,behind is pulled for the main characteristic,the most large cart stress on hook occurs in the train 1/4 and 3/4.1+2+1 grouping trains are close in the stress characteristic and two 2+0+2 grouping trains.Looking from the vehicle stress on hook that, groups the situation is 1+2+1 grouping best,next is 2+0+2 grouping,2+2+0 worst.To did not have the draw link and has in the draw link two kind of situation vehicle stresses on hook to carry on the analysis.Has conducted the comparison research to three kind of buffer under each kind of operating mode vehicle stresses on hook.This work provides the reference for the buffer appraisal,provides the basis for correct choice train grouping and the buffer.