Research on the Relationship between Driving Vibration Noise and Tire-Road Contact Pressure

摘要

Tire-road noise contains two aspects, one is aerodynamic noise, another is vibration noise that the traffic noise affects a large proportion of it. It is obvious that reduction of vibration noise can greatly improve the quality of sound environment in town. The primary task of vibration noise reduction study is to get clear on the generation mechanism of driving vibration noise. According to previous researches, the contact conditions between tire and road surface have a significant effect on driving vibration noise. Especially, there must be a link, having not been rigorously studied, between the tire-road contact pressure and vibration noise. Based on the above, the relationship between driving vibration noise and tire-road contact pressure is established in this paper. Through field experiments, it proves that the driving vibration noise of micro-surface is higher than that of SMA-10 (stone matrix asphalt). Meanwhile, the movement progresses of wheel on these two different pavement surfaces and the contact pressure are simulated via DEM (discrete element model), which shows that the volatility of tire-road contact pressure of micro-surface is greater than that of SMA-10. Both the field experiment and DEM demonstrate that the higher volatility of tire-road contact pressure leads the higher driving vibration noise, which can serve as the theoretical foundation of follow-up study.