Investigate Into Influence Of Tire Tread Pattern On Noise And Hydroplaning And Synchronously Improving Methods

The tire labeling regulation has set requirements of tire safety and environmental protection, the bottle-neck problem of synchronously improving tire quality is contradictory in tire performances. Tire tread pattern performs a decisive function on tire comprehensive properties. It is of great significance to study tread pattern design, to analyze influence law on tire performances. This work is based on the tread pattern of Radial tire205/55R16, the influence of tread pattern structures on tire pattern groove noise and hydroplaning performance is analyzed from numerical simulation, computational fluid dynamics and bionic design. The contradiction between tire pattern noise and hydroplaning performance is verified through the tread design and flow field analysis. Exploring the methods for the reduction of fluid drag force and noise by using bypass structure and the bionic tread groove and realize synchronously improvement of tire properties. The main contents of this work are as follows:Provided an idea on analyzing tire mixed tread pattern noise and hydroplaning performances:extracting the tread groove deformed displacements through ABAQUS and implement it on tread pattern noise and hydro-planning model as the boundary condition, mean while considering the vortex theory and FW-H (Ffowcs Williams Hawkings) equation, and combing it with the computational dynamics to set up the tread pattern groove noise control equation and acoustic field equation. By virtual of Gas-liquid two-phase flow model, tire hydrolplaning is simulated. Based on the VOF (Volume of Fluid) model built up tire hydro-planning and free-field control equation and predict hydroplaning velocity.According to the205/55R16SteeringAce AU01tire pattern groove design, the tread pattern groove noise and hydroplaning model are built up, and then the numerical simulation on tire tread pump noise is done. Tire noise is tested by laboratory drum test. Comparing the simulation results with the experiment results to validate the reliability of the simulated results; this work lays up the foundation for exploring the influence of tread groove on tire pump noise; Combing the deformed character of tread pattern grooves under rolling condition, the tire hydroplanning simulation model is set up and used to predict hydroplaning velocity. To further analysis the water fluid distribution character, the hydrodynamic pressure distribution of tread surface, tire tread groove hydrodynamic pressure as well as the water distribution is visually presented.Tire velocity and water depth for hydroplaning performance are simulated by CFD (Computational Fluid Dynamic), and inflation pressure, load and velocity for tire noise are test for tire rolling noise, all the results show velocity is important factor for tire performance. In order to get the influence law of tread pattern structure on tire pattern noise and hydroplaning performance, with the help of orthogonal test, the width, the depth and the space of circumferential pattern grooves as design factors are analyzed for the two performances. The width, the angle with circumferential pattern grooves and the number of transverse pattern grooves are also analyzed for the two performances. Influence of Tire tread pattern on noise and hydroplaning is obtained. The results show that the structural parameters of tire tread pattern design have importance on tire noise and hydroplaning performance. In other words, tire tread pattern groove noise and hydroplaning performance are conflict in a large extent.In order to settle the integral contradiction of tire noise and hydro-planning performance, the bypass structure and bionic non-smooth structure are separated used. By numerical analysis to study the influence of different bypass structure on tire noise and hydroplanning performance. The results show tire longitude groove with bypass can improve pattern noise and hydroplanning performance; then, the non-smooth tire groove is set up by using the great achievement in tire fluid drag reduction mechanism. The same V-riblet structure of flying animal and aqua animal are chosen as the research object to study how the angle, height affect tire groove water displacement and tread pattern groove noise, in order to explore the best tire groove design method and build multi-performance bionic tire tread groove. Finally, the computational aerodynamic and finite volume method is used to predict and evaluate the tire noise and hydroplanning performance. The result shows that the tread groove with optimized V-riblet structure can reduce tire noise and improve hydro-planning performance synchronously.