Simulation of Train-Bridge Interaction under Wind Loads: A Rigid-Flexible Coupling Approach

Abstract

This study proposed a rigid-flexible coupling method to simulate the train-bridge vibration under the actions of wind loads. Specifically, the numerical models of a rigid train and a flexible bridge were first established in the Multi-Body Dynamics Software SIMPACK and the Finite Element Software ANSYS, respectively. The bridge model was then integrated, using the virtual rigid body as an intermediate, into the SIMPACK as a flexible body through the interface module FlexModal. The wind loads were applied to the coupled train-bridge system in the SIMPACK, and then the dynamic responses were obtained. The accuracy and efficiency of the proposed rigidflexible coupling method was verified by calculating the responses of the train-bridge system under various train speeds and comparing the results with those from FlexTrack module. The Xijiang Bridge on the Nanning-Guangzhou railway was employed as a case study to evaluate the dynamic indexes under various combinations of the train and wind speeds.