Effect of FlatElongated Particle Content on Driving Vibration Noise Based on Discrete Element Method

Abstract:

In order to provide reference for design and construction of lownoise asphalt road, the effect of flatelongated particle content on driving vibration noise was studied. The relationship between driving vibration noise and tireroad contact pressure was investigated by theoretical analysis, field noise tests, and simulations via the discrete element method (DEM). Besides, a new evaluating method for driving vibration noise based on tireroad contact pressure was proposed. The asphalt pavement models with four flatelongated particle contents were built using particle flow code (PFC). Meanwhile, the movement of wheels on these four different pavement surfaces was simulated and the contact pressures were calculated. Finally, the volatility of contact pressure was analyzed. The results show that the effect of flatelongated particle content on driving vibration noise is insignificant at the level of 0, 10%, and 15%. However, the driving vibration noise of asphalt pavement with 20% flatelongated particles is greater than those with lower flatelongated particle content. Thus it can be concluded that excessive flatelongated particle content has a negative influence not only on workability and strength of asphalt mixture, but also on driving vibration noise.