Field Test and Simulation of High-speed Railway Section Where the Plane Curve and Vertical Curve Overlapped

It is crucial for the railway industry to increase the train speed to keep its market share and gain more profit in the modern society. However, the train-track interaction changes greatly with the increasing of speed under the same track condition. Both field test and simulation by software of the vehicle's behavior are conducted in the route section where the plane curve and the vertical curve overlapped. The following indices were studied: the wheel-rail vertical force, wheel-rail lateral force, derailment coefficient, and reduction rate of wheel load. The results indicate that though the two groups of data obtained from field test and simulation are different, they are in the same magnitude range. They have the same pattern though there are some differences in the values. Two purposes have been achieved through the field test. Not only it verified the validity of the alignment parameters, but also proved the accuracy of the simulation.