DYNAMIC ANALYSIS OF RAIL FASTENING CLIP IN HIGH-SPEED RAILWAY

In order to analyze the vibration of rail fastening clip induced by high-speed vehicle dynamic loads,taking the Vossloh rail fastening clip adopted in high-speed railway as a research object and establishing a detailed finite element model of rail fastening system by using software ABAQUS,the paper studies the mechanic behavior of rail fastening clip in the process of installation and the vibration of rail fastening clip induced by vehicle dynamic loads on the basis of the nonlinear contact theory and vehicle-track coupled dynamics theory,and the simulation results are validated through a comparison with the results of field test.Results show that the rail fastening clip is normally installed when the exerting bolt loading reaches 33kN,and the displacement of the middle circle of rail fastening clip is 20.3mm and its clamping force is 13.8kN at that state; the maximum acceleration and displacement of rail fastening clip are 3gand 0.05mm respectively on the condition of rail corrugations,which is well consistent with the field test results; the acceleration of rail fastening clip obtained on the condition of rail corrugations is ten times larger than that calculated on the condition of no rail corrugations,which can intensify the vibration of rail fastening clip and will accelerate its fatigue damage .