Coupling Dynamics Analysis Of The Vehicle And Asphalt Pavement System

With the rapid development of modern transportation, the asphalt pavement has beenwidely used in road construction. However, the existing road design methods based on staticload cannot satisfy the situation of large traffic volume, speed up and heavy loads. Basides,many asphalt pavements have early damages when their service time is less than their designyear. All these factors lead to higher requirement in vehicle design, pavement structural safetydesign and durability design. Therefore, it has important theoretical and practica meaning tostudy the coupling dynamics of vehicle and asphalt pavement system by using the pavementdynamics theory and vehicle dynamics theory together.This thesis links vehicles with pavement by road roughness to study the dynamicperformance of vehicle and asphalt pavement system. Based on the MATLAB software, thetheoretical analysis and number simulation of2-axle vehicle dynamics load caused by roadroughness in the time domain are executed, and the effect rule of vehicle dynamic load byvehicle structural and pavement parameters are analyzed. The asphalt pavement is regarded asan infinite beam on a Kelvin visco-elastic base and a dynamic model of the road undermoving loads is established. By combing the wavelet analysis method with the Fouriertranslation method, the analytical solution in transient is deduced. Then the influence of axleload, vehicle speed, road viscous damper, the facing elastic modulus and temperature on theasphalt pavement response are studied. At last, the stochastic characteristics (ex. contimuousfunction, autocorrelation coefficient and mean square deviation) of the vehicle random loadand pavement dynamic response with different reliability are obtained by the analyticalsolution. This theory provides a valuable theoretical basis for further study about the vehicleand asphalt pavement coupling dynamic response and for future pavement design.