The Coupled Vibration Analysis Between Vehicles And Pavement Caused By Pavement Surface Groove

In order to ensure the skid resistance of cement concrete pavement, we usually groove on the road. Pavement surface groove will cause the vibrations of vehicles, and vibrations of vehicles will react on the groove pavement, so it forms a coupled vibration system between vehicles and road. In fact the process that vehicles are traveling on the groove pavement is the complex process of interaction between the vehicle and pavement. Therefore, in the groove pavement, the interaction between vehicle and road is a subject needs further study. In this paper, the coupled vibrations between pavement and vehicles caused by groove are calculated and simulated.In the paper, the vehicles are simplified as 1/4 vehicles model with two degrees of freedom; the grooves are described by space coordinate functions; then it is to solve differential equations using Laplace transform method, so the impact coefficient is calculated. The results show that:the vehicle speed has little effect to impact coefficient when vehicles are traveling on the groove pavement; the impact coefficient increases when the pavement groove depth or groove width increases and the groove pitch decreases; the impact coefficient increases when tire stiffness or suspension stiffness increases and the suspension damping decreases; the impact coefficient will decrease, but the force that the vehicles act on the road will increase when tire quality and suspension system increases.In this paper, the 2-D finite element model of coupled vibration between the vehicle and pavement with ABAQUS is established to simulate that vehicles are traveling on the groove pavement. The results show that:with the increase of vehicle speed, the contact force and the surface bottom tensile stress decrease; with the surface layer thickness increasing, the contact force is almost unchanged, but the surface bottom tensile stress will reduce drastically; with groove depth and groove width increasing, groove pitch decreasing, the contact force and the surface bottom tensile stress will increase; with suspension damping decreasing, the stiffness of suspension system and tire stiffness increasing, the contact force and the surface bottom tensile stress will increase; with tire quality and suspension system quality increasing, the contact force and the surface bottom tensile stress will increase.