The Study Of Catenary-Pantograph Contact Force Based On Locomotive-Track Coupling Virbration And Aerodynamics

With large amount of passenger dedicated line and intercity high-speed railway establishing and putting into operation, Chinese high-speed railway has achieved drastic development in the direction of speed acceleration. Satety is the most important in the railway transportation, and the well contact between the catenary and pantograph is the precondition for locomotive's safe running. However, with the speed increasing of train, the contact force would varies extremely with the low speed condition. Aerodynamic force is a crucial factor which effects on pantograph when the train drives in high-speed; simultaneously, the effect of the locomotive-track coupling vibration is increased on the catenary-pantograph system. So the study of catenary-pantograph contact force based on aerodynamic and locomotive-track coupling vibration is more significant.At first, on the basis of comparison the pros and cons between various pantographs'models at home and abroad, established based on binary pantograph model, ulteriorly the group of catenary-pantograph system's movement differential equations is derived from Lagrange's equation and solved with the method of central difference by compiling numerical emulation program; given a set of technical parameters, the catenary-pantograph contact force could be emulated.Afterwards, establishes the catenary-pantograph dynamics model based on the dynamics theory of railway system, uses the vibratory response at the substrate of pantograph on the roof of locomotive as the disturbance of catenary-pantograph system and puts it into catenary-pantograph dynamics model; then analyzes the effects of locomotive-track coupling vibration on the catenary-pantograph contact force by using MATLAB software.Eventually, analysis dynamic force of pantograph detailedly and constitute mechanics model, then deduces and calculates each force on the pantograph according with aerodynamic, hydrodynamics and Newton law; emulates and contrast analyzes air raising force and contact force at different operation speed; discusses the measures which can improve the properties of pantographs aerodynamic force.