In this paper, the drum and flat-belt models for tire rolling resistance measurement are set up and the characteristics of contact between tire and dynamometer drum with different sizes are analyzed. Then a measurement/simulation of tire rolling resistance is conducted with a scheme, in which the reaction forces of wheel shaft are calculated based on the stain data of sensors and are then transformed into tire rolling resistance. Finally a rig test of tire rolling resistance is carried out. The results of static loading show that the vertical deflection of tire reduces with the increase of drum diameter, but the tendency weakens when the drum diameter is larger than 2m. The results of steady state measurement/simulation indicate that the tire rolling resistance slightly goes up with the increase in wheel speed, and rises with increased loading almost proportionally, but lowers with the rise in tire inflation pressure. The above tendency agrees well with test results. Under all three conditions with the changes in speed, loading and inflection pressure, the tire rolling resistance reduces with the increase in drum size.%本文中建立了转鼓式和平带式轮胎滚动阻力测试模型,分析了不同转鼓尺寸下轮胎与转鼓之间的接触特性,并采用以传感器的应变测算出轮轴反力,再换算为滚动阻力的方法进行仿真测试,最后进行轮胎滚动阻力的实测试验.静加载的结果表明:轮胎的下沉量随转鼓直径增大而减小,但转鼓直径大于2.0m以后,转鼓大小的影响减弱.稳态仿真测试结果表明,轮胎滚动阻力随着速度增高而稍有增加；随着载荷增加而几乎成正比地升高,但却随着轮胎气压的加大而下降.上述趋势与试验结果相符.在变速度、变载荷和变气压3种情况下,滚动阻力均随转鼓直径的加大而减小.
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