全钢载重子午线轮胎等效模型研究

以11.00R20 18RP全钢载重子午线轮胎为研究对象,基于线性材料提出了单一实体单元结构和实体单元+梁单元混合结构的两种轮胎等效模型。借助Ansys软件,研究了各层材料不同弹性模量对两种等效模型静态刚度的影响,并在此基础上进行了材料弹性模量参数最优匹配分析。基于匹配结果,分别研究了两种等效模型的模态性能,并与试验结果对比,分析了等效模型的有效范围。研究结果表明:基于线性材料的实体单元+梁单元混合结构的轮胎等效模型能较好的模拟轮胎的静态刚度、切向模态和轴向模态,但是径向模态频率整体偏低;在进行车-路耦合仿真等只需要关注径向性能的研究中,可以通过减小带束层材料密度的方式来提高其径向模态频率,使等效模型更加有效。

RESEARCH ON EQUIVALENT MODEL OF TBR TIRE

Based on linear materials,two kinds of equivalent tire models were proposed,which are single solid element structure and solid element + beam element mixed structure,taking TBR tire 11.00 R20 18 RP as the research object.The impact of different elastic modulus of each layer on the static stiffness of two equivalent models was analyzed using ANSYS.And on this basis,the parameter optimization analysis of elastic modulus of materials was carried out.Based on the optimization results,the modal property of the two equivalent models were studied,and the effective range of the equivalent models was analyzed by comparison with the experimental results.The was shown that the tire equivalent model composed of solid element + beam element mixed structure based on linear material can better simulate the static stiffness,tangential mode and axial mode of tire,but the radial mode frequency is relatively low;in the study in which only the radial property is concerned,such as in a vehicle-road coupling simulation,the radial mode frequency can be improved by reducing the density of the bundle layer,so that the equivalent model is more effective.