The Research Of Tight Curve Radius Of Ballastless Track Strucure Of Passenger Traffic Railway

With the continuously increasing train running speed, dynamics response in curve sections got more and more serious and contact condition became worse. Traditionally, from the angle of geometric statics, the research of the interaction between vehicles and track couldn't reflect the complex dynamic interaction between vehicles and track under high-speed driving conditions. Using dynamics theory to study the interaction between vehicles and track under high-speed driving conditions became an urgent problem. But, there were relatively few researches of high-speed railway curve parameter with track irregularity excitation at present. This issue, using vehicle-track spatial coupling dynamics model and taking track irregularity excitation into consideration, analyzed the interaction between vehicle and track in curve section based on the design principle of rolling stock and line dynamic matching, the main contents were as follows:It established vehicle-track spatial coupling dynamics simulation model in simulation software ADAMS/Rail, taking domestic and international track irregularity excitation for reference, adopted Germany low interference track spectrum as track irregularity excitation and verified the reliability of the model.From the aspect of running safety and passenger comfort, this issue chose derailment coefficient, wheel unloading rate, wheels transverse horizontal force, wheel vertical force, car body transverse vibration acceleration and car body vertical vibration acceleration as its dynamics evaluation index system and chose the index limits.Using the established vehicle-track spatial coupling dynamics simulation model, it studied the influence law of different curve radius and superelevation to running safety and passenger comfort dynamics evaluation index with the running speed of 300km/h in slab ballastless track curve section. And also the suggested values of tight curve radius of ballastless track strucure of passenger traffic in the speed of 300km/h is presented.