Numerical Simulations of Dynamic Responses of High-Speed Trains to Random Track Irregularities

High-speed railway is one of the most important critical infrastructure projects in China and has developed rapidly in recent years. Its operational safety and comfort level draw great attention from the society. The random track irregularities may cause unacceptable dynamic responses of high speed trains and degrade the operational safety and passengers'comfort. In current Chinese safety control practices, comprehensive track inspection cars are used to record track irregularity data and corresponding vibration data of inspection cars at a regular frequency. In this paper, the track irregularities data recorded from Beijing-Guangzhou High-Speed Railway are studied following an advanced stochastic modeling approach. A simplified train-track interaction model is created using SIMPACK, which allows for the numerical analysis of the dynamic responses of high speed trains to randomly track irregularities. On the basis of the simulation results of this simplified model, dynamic response for the train under different traveling velocities is analyzed.