Research On Tire/Road Noise Based On Surface Structure And Finite Element Model

With the development of highway construction and the increase in car ownership,there is growing concern about environmental problems caused by traffic noise.Existing research indicates that traffic noise comes mainly from the tire/road interaction,so the tire/road noise becomes the mainly focused content of research on reducing traffic noise.However,the multiscale and complexity of the surface texture make the research of pavement noise more challenging.This study attempts to study the impact of pavement surface structure on tire/road noise using accelerated loading tests and finite element simulations based on existing research,and lays a good theoretical foundation for low-noise pavement design based on pavement surface characteristics.The main driving wheel type accelerated loading test system was used to analyze the indoor tire/road noise.Explore the relationship between different road types and running speeds and tire/road noise.It was found that of the three pavement types,OGFC road produced the least noise,followed by SMA pavement and AC pavement,and there was a positive correlation between tire/road noise and running speed.Through the spectrum analysis of noise,it is found that the frequency range mainly affected by different pavement types is different.After obtaining the tire vibration displacement,use this as a boundary condition to input it into a three-dimensional "tire-road-air" coupling model to simulate tire/road noise.The results show that the law of pavement noise changes with pavement type and running speed obtained by finite element simulation is consistent with the law of acceleration loading test noise,but the simulation value is larger than the actual measurement.The feasibility of the finite element model was verified by scaling and calibrating the finite element noise model to reduce the difference between them to within ± 1.0 d B(A).Based on the above research,the relationship between AC and SMA pavement surface structure and tire/road noise was analyzed using the finite element method,and the parameters such as the MPD and contour angle related parameters were selected to establish a relationship with the noise sound pressure level.It was found that in the lower frequency range,the noise sound pressure level increased with the increase of the tangent between the MPD and the peak top angle cotangent,and in the higher frequency range,the noise sound pressure level increased with the MPD and the peak top angle cotangent.The increase of the tangent value of the angle decreases,and it can be known that the surface structure of the road surface is too large and too small,which is not good for road noise reduction.Through further analysis,we know that when the MPD is between 0.9 mm and 1.4 mm and the profile angle is between 120 ° and 160 °,the tire / road noise is relatively low.