| A finite element model of radial tire which type is 205/60R15 was built by ANSYS which is a large finite element analysis procedure. Based on the consideration of nonlinear property, geometric nonlinearity caused by the large deformation of tire, assembling of tire with rim, contraction force of cord and nonlinear boundary conditions resulting from the contact of tire with road, belt angle was simulated by changing the direction of material axis and the steady state rolling analysis was performed by using LS-DYNA which is an explicit integral nonlinearity dynamical analysis procedure. The radial tire rolling resistance was simulated and analyzed by using thermal implicit-explicit order solution method of ANSYS/LS-DYNA. The fluid-solid coupling analytic function was used for the analysis of radial tire hydroplaning .The tire deformation and contact pressure of tire which suffered inflation pressure and vertical load in braking condition, rolling condition and driving condition was analyzed in this paper. Based on the dynamic analysis of tire and thermal energy loss, the analytic method of thermal-structure coupling was used to the finite element analysis of radial tire steady state rolling resistance. The influence of five parameters which include speed, inflation pressure, vertical load, crown compound elastic modulus and belt angle to tire steady state rolling resistance was mainly studied. The results show that speed and vertical load have an important influence on tire rolling resistance. Tire rolling resistance increase with speed and vertical load. The influence of inflation pressure and belt angle to tire rolling resistance was not very obvious. In addition, the water flow state when tire occurred hydroplaning in wet-road was studied in this paper.
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