The Theoretical And Simulational Analysis Of Rolling Resistence In Steady State Tires

In the current situation, our world is experiencing the increasing shortage of energy resources and the increasing demand of energy. How to improve the energy efficiency and reduce the energy loss of the rolling tires is a major challenge for the researchers and scientists of the tire technology. It is significant and crucial to study the rolling resistance of the tires under steady state.At first, the rolling resistance of tires is elaborately explained based on the material hysteretic theory. Then a complete tire deformation-energy loss-thermal analysis framework using thermodynamical semi-coupling method is presented. A finite element model of the 12R22.5 was built using ABAQUS. Based on the consideration of nonlinear property,geometric nonlinearity caused by the large deformation of tire,assembling of tire with rim and nonlinear boundary conditions resulting from the contact of tire ,the steady state rolling analysis was performed by using ABAQUS/STANDARD which is an implicit integral nonlinearity dynamic analysis software. The heat rate and energy loss are calculated by a FORTRAN program. Then the above result is imported into the two-dimensional thermal analysis of the process via the use of ABAQUS subroutine HETVAL, and then the temperature field analysis of the steady state tires can be acquired. Based on the above analysis, the rolling resistance can be obtained.The paper focuses on the impact of speed, inflation pressure, vertical load on the tire steady state rolling resistance of the steady state tires. The results show that under a certain speed and inflation pressure, the rolling resistance and rolling resistance coefficient increases with the increase of load; under a certain speed and vertical load, the rolling resistance decreases with the increase of the tire inflation pressure. Generally Tire rolling resistance and rolling resistance coefficient decreases when the steady-state speed increases.