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The Coupled Vibration Analysis between Vehicles and Pavement Caused by Pavement Surface Groove

Author: LiYunChao
Tutor: ZhongYang
School: Dalian University of Technology
Course: Road and Railway Engineering
Keywords: Pavement grooving Vehicle model Coupled vibration ABAQUS Laplace transform
CLC: U461.5
Type: Master's thesis
Year: 2011
Downloads: 56
Quote: 0
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Abstract


Usually on the road in order to ensure that the cement concrete pavement skid resistance, the processing of the groove. Due to road groove will cause the vibration of the traveling vehicle, while the vehicle vibration would be counterproductive to the road surface, the vehicle - the road surface to form a vibration system of a coupling. In fact, the process of vehicles traveling on the roads of the groove is the complex process of the dynamic interaction of the vehicle and the road surface. Shows in the groove on the road, the interaction between moving vehicles and the road requires in-depth study. To solve this problem, the theoretical calculation and simulation analysis of pavement grooving caused by vehicle - road coupled vibration. The vehicle simplify two degrees of freedom of 1/4 vehicle model to describe the use of space coordinate functions of pavement grooving, and as a vehicle vibration model input stimulus, using Laplace transform method to solve the differential equations of motion calculated the impact factor of the vehicles on the grooved pavement. The results show that: in the process of the vehicle, the the traveling speed impact factor is small; engraved groove with the road surface groove depth and groove width increases, the slot spacing decreases, the impact factor gradually increasing; tire stiffness, suspension The stiffness of the system increases, the suspension system damping decreases will cause impact coefficient increases: increasing cause shock suspension system quality tire quality coefficient decreases, but the force of the vehicles on the road will increase. The article also use ABAQUS simulation software to establish a two-dimensional finite element model of vehicle - road coupled vibration of vehicles traveling on the grooved pavement. The simulation results showed that: With the vehicle traveling speed increases, the vehicle contact force between the road surface and bottom surface layers of the tensile stress gradually decreases; increase in the thickness of the surface layer, and not a significant impact on the contact force, but will significantly reduce the tensile stress in the surface layers bottom; road increases, the reduction of the groove spacing, will cause the vehicle road contact force between the layers bottom stress increases with the face of the groove depth and groove width of the notch groove; Suspension system damping decreases, the suspension system stiffness increases, the the tire stiffness increases will cause the contact force between the vehicle road surface layers bottom stress increases; suspension system mass and the tire quality increases will be between the vehicle road contact force with the surface layers of bottom stress increases.

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