Analysis of Longitudinal Impulse for 20 000t Heavy Load Train in Traction Start-up Condition
The coupler is an important component of the heavy-haul train,and the coupler force has a significant impact on the running safety of the heavy-haul train.In order to analyse the coupler force of 20 000t heavy-haul train under different working conditions,based on the train longitudinal dynamics theory,train control method and the dynamic modelling method of the hook retarder,the longitudinal dynamics model of 20 000t heavy-haul train assembled by HXD1 locomotive and C80 coal haulage con-verters was established to analyse the coupler force distribution law of heavy-haul trains running though different traction force,slave control locomotive lag and different coupler clearance.The results show that the lifting speed of traction force has no obvious effect on the steady-state coupler force under trac-tion conditions,while the increase of traction gear significantly increases the steady-state maximum cou-pler force.The traction gear should be reduced while ensuring the normal traction and starting of the train.With the increase of starting time difference between the master locomotive and the slave locomo-tive,the pull force in the middle and tail of the marshelling vehicle increases,so the simultaneous opera-tion of the train should be guaranteed as much as possible.The clearance of coupler has obvious influ-ence on the tension of coupler during the start of heavy duty train.Attention should be paid to the main-tenance of coupler clearance,and the coupler force can be reduced with the use of traction bar.
heavy load trainforce of tractioncoupler clearancetraction startforce of coupler
万方数据
维普
