Research On Fluid Dynamics Of Tire Pattern Groove

Tires as the only contact with the ground parts of the vehicle, is an important part of the car. It has an important influence on the vehicle handling stability, ride comfort, load carrying capacity,etc. With the development of the automobile industry, people gradually realize the negative effects brought by the automobile, including the noise pollution of the tire. The European Union, Japan and the United States have their own tire noise regulations, the most stringent EU regulations which directly limit the development of China’s tire industry in the overseas market. The design of low noise tire has become a hot topic in the tire industry.In recent years, with the development of the computer, the tire finite element technology is mature, but the research of the tire fluid dynamics is still in the stage of exploration. There are many types of tire noise, the formation mechanism is very complex. As the main source of tire noise, the air-pumping noise is the hot spot of research. Under different working conditions, different lateral pattern grooves are analysed by fluid-structure coupling numerical simulation, provides the basis for tread pattern design and tire noise research.The all steel radial truck tire 12.00R20 which has lateral pattern groove is the research object in this paper. A three-dimensional finite element model of 12.00R20 radial tire which has lateral pattern groove is established. And the validity of the model is verified.By using the transient rolling analysis in Abaqus, the finite element model of the tire was analyzed under 70km/h, 90km/h and 110km/h three kinds of working conditions. Then extract the displacement curve of the pattern on the block surface when the tire rolling cross the road, as the fluid-structure coupling calculation of boundary conditions based on Python. A single lateral pattern groove model, road and air domain are established, loading the displacement on the block surface. Based on ANSYS Workbench 16.0, the two-way fluid-structure coupling numerical simulation of the single pattern groove is studied by the System Coupling module. And the validity of the fluid-solid coupling model is verified.The model of both ends open pattern groove and one end seal pattern groove were analyzed under 70km/h, 90km/h and 110km/h three kinds of working conditions. The variation trend of the air velocity, axial velocity and static pressure on the stages of exhaust and suction were compared.In addition, the air velocity, axial velocity and static pressure on the 60 mm cross section and 70 mm cross section were compared under 70km/h, 90km/h and 110km/h three kinds of working conditions.