Three-Dimensional Fine Mesh Finite Element Analysis Of Radial Tire

Due to the limitation of computer hardware and operate time, for structure is relatively complex such as tire, the finite element mesh is not divided into dense enough, this will produce bigger error inevitably. For certain areas of stress concentration, such as pattern, tire body, calculate result caused by discrete error is not reliable. Again to the noise research of tire pump, it needs tires grid reach the mm level, it also needs our tire to do fine mesh finite element analysis. Finite element meshing theory argues that when meshing dense enough, it can make the discrete element numerical solution close to the real value fully. Combined pattern’s modeling is difficult. This paper tries to improve three-dimensional fine mesh finite element analysis of radial tire with combined pattern.1. To establish a tire body’s two-dimensional grid within a meridian plane in Hypermesh. Reuse*SYMMETRIC MODEL GENERATION to generate3d body. According to12.00R20’s outside profile for the inner tube surface in the meridian plane is the circular arc, based on the modeling method of revised quasi-conformal mapping cluster, combined pattern and lateral pattern are established, this method can easily draw out high quality hexahedral grid.2. The global model with combined pattern, lateral pattern and longitudinal pattern are established. Tire bead and crown of combined pattern are established based on the combined modeling technique respectively, crown submodel of combined pattern is established based on the submodel technique.3. The mechanical characteristics of inflatable and static load condition are simulated. By compare the tire grounding performance of three different decorative pattern, the importance of combined pattern is illustrated. In turn, the effectiveness of the global model and submodel is verified. Skeleton structure characteristics of different meridian plane is analysised by submodel technique, includes belt and body.4. Submodel and composite model are used to the danger zone analysis respectively according to the structure characteristics of tire crown and bead. Belt ends is puted forward improvement. The damage form of bead is analysised.5. The steady-state rolling of combined patterns tire model is analysised in ABAQUS/Standard, include free rolling, braking, traction and cornering. Tire road contact pressure distribution and cornering performance is concluded.6. The combined pattern tire dynamic rolling at70km/h speed in a horizontal road is simulated in ABAQUS/Explicit. After loaded a short period of time, tire center is vibrated in the vertical direction of the road, stable gradually. Crown dynamic submodel is analysised, its rationality is verified.7. Dynamic submodel and combined model are analysised respectively. The result of belt part is compared. It can be seen that the stress difference between the free rolling condition and the static load is not big.8. Python and C language realize automatic post-processing is introduced. Entire tire fine analysis method based on combined modeling technique or submodel is proposed, the method of boundary condition of acoustic calculation is obtained too.