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2. 发明申请

US20100010795A1 Method for Simulating the Thermomechanical Behavior of a Tire Rolling on the Ground 有权
公开(公告)号：US20100010795A1
公开(公告)日：2010-01-14
申请号：US12439684
申请日：2007-07-26
申请人： Pierre Fevrier , Herve Martin , Gerard Fandard
发明人： Pierre Fevrier , Herve Martin , Gerard Fandard
IPC分类号： G06F17/50 , B60C19/00
CPC分类号： G06F17/5009 , B60C99/006 , G06F17/5095 , G06F2217/80
摘要： A process for simulating the physical behavior of a vehicle tire rolling on the ground with which the tire tread has an area of contact including at least one adherent contact zone and at least one sliding contact zone, which process includes at least modeling operations, numeric value assignment operations, and solving operations, wherein the modeling operations comprise establishing, by applying physical laws that are known and/or developed by specific experimentation, and as a first model, a model of the longitudinal forces (Fx), the transverse forces (Fy), and a self-alignment torque (Mz), transmitted by the tire between the ground and the vehicle, on the basis of specific physical parameters, including an adherence coefficient and a shear modulus of the rubber of the tire, and on the basis of dynamic parameters associated with the physical conditions of rolling and use of the tire, in which the self-alignment torque is associated with the intensity of the longitudinal and transverse forces and their distribution in the contact area, wherein the assignment operations comprise assigning numeric values to the dynamic parameters and to the specific parameters, and wherein the solving operations comprise deducing, using at least the first model and the values assigned to the dynamic parameters and to the specific physical parameters, the values of the longitudinal forces (Fx), the transverse forces (Fy) and the self-alignment torque (Mz), wherein the modeling operations further comprise establishment, as a second model, of a local heating model expressing variations in a temperature of contact of the tread with the ground from the beginning to the end of the contact area due to the contact and the slip of the tread with the ground, and establishment, as a third model, of a general heating and thermal flux model, in which said third model expresses variations, over a period of at least one wheel rotation, in a peripheral tread temperature and an internal tire temperature on the basis of values previously known or estimated from peripheral and internal temperatures, a coefficient of thermal conductivity of the tread, and phenomena with a thermodynamic component such as internal deformations of the tire, heat transfers between the tire and its environment, and slip of the tread on the ground, in which at least the adherence coefficient and the shear modulus are involved in the first model as variables, respectively based on the peripheral temperature and the internal temperature, in which the value of the peripheral temperature, obtained by solving operations concerning the third model, is used by solving operations concerning the second model in order to take into account the temperature dependence of the adherence coefficient, and in which the value of the internal temperature, obtained by solving operations concerning the third model, is used by solving operations concerning the first model in order to take into account the temperature dependence of the shear modulus of the rubber of the tire.

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