Simulation of the "vibrating roller - compacted asphalt concrete" system
Abstract
Simulation of the "vibrating roller - compacted asphalt concrete" system
Incoming article date: 18.08.2022In this paper, the results of modeling the system "vibrating roller - compacted asphalt concrete" are considered. The analysis of the state of the quality of compaction of asphalt concrete mixture by the method of continuous control of compaction of asphalt concrete, as well as the influence of the behavior of the fluctuating mass of the roller on the viscosity properties of asphalt concrete is given. A mathematical model has been developed that allows taking into account the influence of asphalt concrete properties changing during the compaction process on the vibration characteristics of the vibrating roller. The spectrum of accelerations of the vibrating roller and the graph of the dependence of the stress of the asphalt concrete mixture in the compaction process are obtained. The developed model makes it possible to determine changes in the properties of the compacted material and the nature of vibrations of the vibrating roller. It is determined that with an increase in the value of the stiffness coefficient of asphalt concrete, the acceleration spectra of the vibrating roller also change. When the vibrating roller is in constant contact with the surface, only the harmonic at the operating frequency of the vibrating roller is visible on the acceleration spectrum, without the manifestation of other harmonics and subharmonics.
Keywords: vibration roller, asphalt concrete, material compaction, dynamic model, vibration characteristics, acceleration spectrum