ABSTRACT
A study on the coupled vibration of X-style arch Railway Bridge and moving vehicles is presented in this paper. The bridge is represented with a 3-D finite element model. Each 4-axle vehicle is modeled by a 35 degrees-of-freedom dynamic system. The random irregularities of the tracks are generated from the power spectral density function under the given track condition. The couple between the bridge and train is realized through the contact forces between the wheels and track. Then applying time-integration and iteration techniques to the coupled system, the coupled equations of motion are efficiently solved. The proposed formulation and the associated computer program are then applied to a certain X-style arch railway bridge. The dynamic responses of the bridge-vehicle system are computed. The results show that the formulation presented in this paper can well predict dynamic behaviors of both bridge and train with reasonable computation efforts.
