Train-track-ground coupling numerical method for railway traffic induced ground vibration.

Based on the vehicle-track coupling dynamic theory, a numerical method is developed to simulate the train induced ground vibration. The considered vehicle is modeled as multi-body dynamic system including the suspension springs and dampers. The track is meshed by a composite beam finite element. The three-dimensional hexahedron finite element is used to mesh the calculation domain of the ground. Impedance and scattering characteristics of the calculation domain edges are simulated by three-dimensional visco-elastic artificial boundary. Simulation are performed for the ground vibration generated by the train with a composition of eight cars running at the speed of 200 km/h. Comparisons of this work and existing studies indicate that the result of numerical method agrees well with that of analytical method, and the preliminary prediction of the train induced ground vibration can be implemented by using of the numerical method. [ABSTRACT FROM AUTHOR]