Nonlinear Dynamic Analysis of Multi-vehicle Vehicle-bridge Coupling System

By analyzing different nonlinear models of vehicle-bridge coupling vibration when multiple vehicles travel on a bridge, this paper proposes the nonlinear vibration equation of multiple vehicle vehicle-bridge coupling. A comprehensive analysis is conducted on the quarter vehicle model, the nonlinear motion model of the bridge, and the coupled coupling equation of the vehicle and bridge. The vehicle-bridge coupled nonlinear analysis model of a single vehicle is established, and the correctness of the results calculated by the model is verified by calculation examples. In addition, taking the three-span continuous beam bridge with equal cross section and equal span as an example, this paper studies the driving conditions of multiple vehicles respectively from the influence of vehicle number, vehicle spacing and vehicle speed on the dynamic response value of the bridge. The results show that vehicle speed, vehicle number and vehicle spacing have significant influence on the dynamic response value of the bridge. (paper)