Optimization Of Boot And Rail System For Medium And Low Speed Maglev Train

As a new urban rail transit mode,medium low speed maglev train has been developed and applied in recent years due to its advantages of low noise,low energy consumption and large capacity.The collector shoe and the contact rail system provide the energy for walking and suspension.It is the only source of the flow of the vehicle and plays an important role in the operation.The good coupling of the boot and rail system is the key factor for the reliable operation of the medium and low speed maglev train.In the current operation process,there are many problems in the boot and rail system,such as oversize,easy impact,and excessive noise at the expansion joint of the skate.This leads to the problem that the collector shoe is always working in harsh working environment,which is prone to arcing,falling and excessive wear.It will affect its life and increase its use cost,which may reduce its reliability and affect the normal operation of trains.It is needed to establish the dynamic model of the shoe track,compile the simulation program of the collector shoe and the contact rail,and get the dynamic performance index value of the boot rail,and verify it through the actual measurement of the track to research and optimization of the boot and rail system of medium low speed maglev train.The dynamic research and analysis of the existing boot and rail system are carried out,and the evaluation index and key parameters are determined to find out the key points of its deficiency and optimization.After the optimization of the boot and rail system,the simulation verification is carried out.In order to solve the present problem,the shoe and the contact rail entity are seen as the standard to establish a model and simulation;the contact force are seen as the evaluation index,and referencing EN50317-2002,EN50318-2002 and TB/T 3271-2011 requirements.The test proved the correctness of the model and trust degree.Under different running speeds,the contact force curve obtained by simulation is evaluated for the existing shoe rail system,and the root cause of its characterization is found.After adjusting the running speed,static contact pressure,expansion joint height difference,span and other parameters,the simulation is carried out again.Through the simulation results,the influence of the key parameters on the dynamic characteristics of the boot and rail system is studied,and the optimum combination is selected and the optimization suggestion is given.The research shows that the static contact force for mid low speed maglev shoe rail system should not be too large,the span length is determined to be 3m,and the contact rail after expansion joint should be slightly lower than the previous contact rail,and the height difference is not greater than 1mm.The simulation results show that the dynamic performance of the optimized shoe track is better than that before the optimization.