Coupling Vibration of Vehicle-Bridge System

By applying the sinusoidal wave mode to simulate the rugged surface of bridge deck,accounting for vehicle-bridge interaction and using Euler-Bernoulli beam theory,a coupling vibration model of vehicle-bridge system was developed. The modd was solved by mode analyzing method and Range-Kutta method,and the dynamic resporne and the resonance curve of the bridge were obtained It is found that there are two resonance regions,one represents the main resonance while the other the minor resonance,in the resonance curve. The influence due to the rugged surface,the vibration made of bridge,and the interaction between vehicle and bridge on vibration of the system were discussed. Numerical results show that the influence due to these parameters is so significant that the effeet of roughness of the bridge deck and the mode shape of the bridge can't be ignored andthe vehide velodty should be kept away from the critical speed of the vehicle.