Dynamic Simulation Study Of Curve Parameters Of High-Speed Railway Based On Three-Dimensional Railway Line Model

With the improvement of train running speed, the dynamic interaction between vehicle and the railway line has become increasingly significant, particularly in the curve segement. As the traditional railway line parameter research methods didn’t focus on the vehicle-rail interaction, hence a large number of scientists engaged on this research by establishing the vehicle-line dynamic coupling model to do dynamics simulation, and obtained outstanding achievements. However, the current dynamics coupled models are built based on planar railway line model without considering profile parameters like railway line longitudinal grade, which is distinct from the three-dimensional railway line and makes only part of the law reflected. To have a more truthful and reasonable reflection about the vehicle-line dynamic interaction, establishing a three-dimensional line model and simulation analysis is of great significance for the study of the rational allocation of high-speed railway line parameters.Based on a detailed study of the previous vehicle-line dynamic coupling model, this paper establishes three dimensional model, vehicle model, non-ballasted track model about the curve segement. And it also briefly introduces the calculation method about the wheel-rail contact parameters. Considering the large amount of parameters that affect the three-dimensional line model, the author choose railway line longitudinal grade, real set superelevation, curve radius and train running speed as the study parameters, and use the VC++programming for numerical calculation and simulation of the model.Through different combination of railway line longitudinal grade, real set superelevation, curve radius and train running speed, we substitute it into the model to calculate, and analyze the results, summarize the effects of every parameter in the three dimensional model on the system, and finally provide theoretical support and suggestion for the design of high speed railway and reasonable choice of line parameters.