不同载荷和初始气压下滚动轮胎稳态温度场的测试与有限元分析

EXPERIMENT AND FINITE ELEMENT ANALYSIS OF STEADY-STATE TEMPERATURE DISTRIBUTION IN ROLLING TIRE UNDER DIFFERENT LOADS AND INITIAL INFLATION PRESSURES

进行了转鼓试验下滚动轮胎稳态温度场的测试;采用试验与计算相结合的方法验证了轮胎在转鼓试验中的实际滚动状态为自由滚动状态;根据解耦的分析思想,进行了转鼓试验下滚动轮胎稳态温度场的有限元分析。用实测的轮胎内部点的稳态温度对有限元的分析结果进行了验证,二者的一致性表明了该分析方法的可靠性。着重讨论了轮胎载荷、初始气压等因素对轮胎稳态温度场的影响。结果表明:随着载荷的增加,整个轮胎的温度场都呈上升的趋势;随着初始气压的增大,轮胎胎侧区域的温度场呈下降的趋势;初始气压对胎冠区域温度场的影响较小。

The steady-state temperature distribution in the rolling tire was measured under different working conditions. In order to determine the real situation of the tire in drum test, which is essential in the following numerical simulation, a method that combines angular velocity measurement and numerical simulation is presented. The steady-state temperature distribution in the rolling tire is predicted with finite element method according to the uncoupling idea. The calculated temperatures at several internal points in the tire are compared with the measured ones. The agreement of them indicates the reliability of the method. The influences of load and initial inflation pressure on steady-state temperature distribution were discussed with this method. Numerical results show that the temperature of the whole tire rises with the load increasing, while the temperature of the tire side decreases with the initial inflation pressure increasing. In addition, the temperature distribution at tire tread is only slightly affected by different initial inflation pressures.