Study On Dynamic Effect Of Alignment Parameter On Train Running Quality And Its Optimization For High-Speed Railway

With the rapid development of high-speed railway, the dynamic interaction between trains and their nether supporting structures is much more strengthened owing to the sharply increase of train running speed, and the aroused dynamic problem becomes more serious and complicated accordingly. On one hand, the destructive effects of train load on the supporting structures are getting more severe. On the other hand, the influence of route geometric condition on running safety and ride comfort tends to be more sensitive. Conventional study on railway alignment parameter does not consider the complicated wheel/rail dynamic interaction. As a result, the effects of route alignment parameters on running safety and ride comfort cannot be estimated exactly, especially for high-speed railway. Therefore, how to improve running safety and ride comfort by means of designing proper route alignment becomes a prominent topic of current research in railway engineering.Based on the analyses of the effects of route alignment parameters on running safety and ride comfort, a model of dynamic interaction between vehicles and structures was established. By means of this model, an investigation was conducted into the effects of the alignment parameters, the matching of horizontal and longitudinal section as well as the district route geometric conditioin on the system dynamic responses in turn. As a result, the basic principles of alignment parameter selection and an evaluating and optimizing method for district route design were presented, which was expected to provide some theoretical basis and reference for high-speed railway route design. 141 Figures, 31 Tables, 158 References.