Research On Relationship Between Tire Hydroplaning And Noise Performances And The Method Of Synergistic Improvement

When the tires are hydroplaning,the vehicle is prone to slipping and deviation,which seriously threatens the driver's driving safety.When the vehicle speed exceeds70km/h,tire noise will become one of the important noise sources of the vehicle,and long-term in a noisy environment will affect people's physical health and normal life.There is a contradiction between tire hydroplaning and noise performance.At present,the contradictory relationship between the two properties is not clear,and the grounding characteristics of the tire and the flow field characteristics in the groove reflect the many properties of the tire.Therefore,the relationship between tire hydroplaning and noise performance is studied based on tire grounding characteristics and flow field characteristics in the groove,and a design method for designing a tread structure for improving the performances of tire hydroplaning and noise,which is of great significance for improving driving safety and improving the living environment.Based on the ANSYS workbench platform,the finite element model of the tire-pavement shell of the 185/60R15 complex pattern is established.The static loading analysis is carried out,and the simulation results are compared with the experimental data to verify the validity of the model.On this basis,the finite element model of fluid-solid coupling of tire hydroplaning and noise is established.The influence of grid number on hydrodynamic lift and sound pressure is analyzed.The mechanism of tire hydroplaning and noise is explained by the combination of hydrodynamic pressure cloud map and static pressure cloud map.According to the empirical formula of hydroplaning speed and noise test data,the rationality of tire hydroplaning and noise model is verified.In order to obtain the tire grounding characteristic parameters,ground pressure distribution tests are carried out on ten tires.The relationship between grounding parameters and tire hydroplaning and noise performance is constructed by correlation analysis and principal component analysis.The results show that there is a contradiction between the tire hydroplaning and the tire noise performance,and the second long-axis coefficient of the grounding footprint has the most significant influence on the relationship between the two performances.In order to further explore the relationship between tire hydroplaning and noise performance,the simulation analysis of hydroplaning and noise is carried out on three tires with different pattern forms.Byanalyzing the flow field characteristics in the grounding area,it is found that the contradiction between the two properties is mainly reflected in the pressure difference and velocity characteristics inside the groove.Improving the smoothness of fluid flow inside the groove can synergistically improve the performance.Combining the conclusions of tire grounding characteristics and flow field characteristics,the design of the tire transverse pattern is redesigned to improve the smoothness of fluid flow inside the groove.Combining the optimal Latin hypercube test and Kriging approximation model,the non-dominated sorting genetic optimization algorithm is used to optimize the tread pattern structure.Based on the fluid domain sub-model,the performance of tire hydroplaning and noise before and after optimization is predicted.The results show that the tire hydroplaning and noise performance can be synergistically improved by optimizing the transverse pattern of the tire tread.