Study On Technological Conditions Of The Vertical Curve Of High-Speed Railway Based On Dynamic Analysis

As a great achievement of railway technology, high-speed railway produces great influence in the history of railway. With the construction of high-speed railway and development of high-speed vehicles, dynamic interactions between vehicles and the track are growing, which are especially more complicated in the curve segement. Being not considered the vehicle-rail dynamic interaction in traditional designing method of railway alignment parameter, the effects of route alignment parameters on running performance of vehicle can not be estimated exactly.In this thesis, based on the multi-body dynamics, dynamic vehicle-rail model of the vertical curve segement is established after analyzing parameters of the route and high-speed vehicles in detail. The model with different forms and radiuses of vertical curve is simulated using SIMPACK simulation analysis software. Through analysis of the simulation data, the vertical acceleration, the wheel-rail vertical force, rate of wheel load reduction and derailment coefficient of different forms and radiuses of vertical curves are obtained.The vehicle-rail dynamic response pattern with different forms and radiuses of vertical curves of high-speed railway is concluded after the simulation analysis. The relationship between vertical acceleration, wheel rail vertical force, rate of wheel load reduction, coefficient of derailment and the parameters of vertical curves when the high-speed vehicles running in the vertical curve. The minimum value of radius of vertical curves in different speed conditions is summarized and recommended. According to the results of the analysis, some proposals are given for the high-speed railway of dynamic location design, which can provide certain theoretical basis and reference.