Study on the dense-graded asphalt concrete pavement correlation between tire-pavement noise and vibration

This research selected five representative dense-graded asphalt concrete pavement (DGACP) sections in Beijing to study the effects of vehicle speed, road surface roughness, and tire vibration on tire-pavement noise. The on-board sound intensity (OBSI) method measured tire-pavement noise within a speed range of 40–80 km/h. And the vertical vibration acceleration of the tire and the road surface roughness were also detected. The study further investigated the factors influencing tire vibration and analyzed the correlation of tire vibration acceleration with vehicle speed and road surface roughness, respectively. Finally, the relationships between tire-pavement noise, vibration acceleration, vehicle speed, and road surface roughness were examined. The findings indicate that tire vibration acceleration on AC-16 pavement is higher than on AC-10 pavement, and the vibration acceleration increases annually. Due to the air pumping effect, tire-pavement noise on AC-10 pavement is approximately 5.0 % lower than on AC-16 pavement at the same vibration acceleration. The results show average vibration acceleration a_av of tire-pavement noise correlates with vehicle speed and road surface roughness. At the same time, the equivalent sound pressure level L_eq has a logarithmic relationship with average vibration acceleration a_av. The equivalent sound pressure level L_eq also has a logarithmic relationship with vehicle speed. Based on these correlations, it is hypothesized that a similar logarithmic relationship exists between the equivalent sound pressure level L_eq and road surface roughness.