Dynamic Model of Vibratory Roller Compaction Process and Analysis

Kunyang ZHANG

School of Civil Engineering, Chongqing Jiaotong University, Chongqing, China 

Abstract: Based on the process of vibration compaction of asphalt pavement as the research object, this paper expounds the road vibration compaction mechanism, set up the process of vibration compaction vibratory roller - soil system dynamics model of two degree of freedom, and the dynamics equations are solved, it is concluded that the relevant model parameters effect on the pavement compaction. Analysis parameters relationship found that in this model, the vibration acceleration is only related to soil stiffness and damping, and the process of vibration compaction parameters of asphalt mixture is changing, so the vibration acceleration is also a process of dynamic change; Homework at the same time, along with the process of vibration compaction, the second order natural frequency of vibration compaction system increases gradually, near the natural frequency of the excitation frequency, easy to produce resonance, so the best vibration frequency and the corresponding larger; Analyzes the relations between vibration wheel pressure amplitude and vibration strength, found that increasing the amplitude of vibration wheel, can improve the dynamic force of wheel and the soil vibration, obtain good compaction effect.

Keywords: Vibratory roller;Vibration acceleration;Dynamic model;Vibration frequency;The amplitude