汽车车轮胎唇-胎圈座间接触压力分布模型的构建

Modeling of the Contact Pressure Distribution Between the Tire Bead and Bead Seat of Vehicle Wheel

采用J.Stearns提出胎唇-胎圈座之间的接触压力按余弦规律分布的假定进行车轮在径向载荷作用下的强度仿真所得到的轮辋等效应力与实验测试结果有明显较大偏差。为解决此问题,本文首先对胎唇-胎圈座间接触压力分布进行了实际测试,获得施加径向载荷引起的分布压力的变化曲线;接着,基于该压力分布曲线拟合出新的胎唇-胎圈座间接触压力分布模型;最后基于该新模型进行仿真。结果表明:采用所构建胎唇-胎圈座接触压力分布模型,可获得比较符合实际的轮辋等效应力分布。

The equivalent stresses in wheel rim obtained by a simulation based on the assumption proposed by J. Stearns that the distribution of contact pressure between tire bead and bead seat follows the cosine law are sig- nificantly deviated from test results. To resolve this problem, the contact pressure distribution between tire bead and bead seat is measured first and a curve of the change of distributed pressure caused by applying radial load on wheel rim is obtained. Then a novel contact pressure distribution model between tire bead and bead seat is built based on the fitting of that pressure distribution curve obtained. Finally a simulation is conducted on the new model built. The results show that with the new contact pressure distribution model built, an equivalent stress distribution in wheel rim closer to reality can be obtained.