Numerical Simulation Of Vehicle-Bridge

Dynamic response of bridge structures is an important subject of the bridge research field. The vehicle moving loads would lead to more deformations and stresses for bridge structures. With the rapid development of modern highway communication, bridges span the record being broken, and the new structure of bridge being innovated. So the analysis of the dynamic response, the vehicle load on the bridges, has put forward higher requirements.When the vehicle passes the bridge with the certain speed, bridge will produce dynamic effect, such as vibration and pound. etc. The vibration of bridge also has an effect on the vibration of vehicles at the same time. This kind of interaction is called 'vehicle-bridge coupled vibration'. The numerical simulation of vehicle-bridge is a question of practical significance, this method preliminarily study, the principal tasks are as follows:(1) According to the power spectral density (PSD) simulate A,B,C,D,E five grades of road roughness.(2) Based on simplify vehicle-bridge model, reason the vibration incremental movement equation from vehicle-bridge vibration equation.(3) B ased on the la rge-scale finite element software ANSYS and the vibration incremental movement equation, analysis the dynamic magnification factor of vehicle-bridge affected characteristic road roughness and "jump" status.(4) Using ANSYS/LS-DYNA explicit analysis to stimulate 'vehicle-bridge coupled vibration, construct model of the vehicle and bridge , respectively, consider the course of the campaign to simulate collisions contact interaction. Present preliminary findings. Research vibration affected element division, materials of bridge. The impact of road roughness is equal to the impact of the vehicle.As the complexity of the impact of factors, it is only preliminarily reason that the vibration incremental movement equation, use ANSYS / LS-DYNA to try of the simulation order to further study.