Computational techniques on the stochastic excitation of rolling tires from the rough road surface contact

在以前的研究中，滚动轮胎辐射的高频噪声，使用详细的有限元模型，我们得到了定性准确的结果。然而，我们发现了两个问题：计算的本征频率低于实验中观察到的，道路纹理的影响还没有完全理解。在所提出的项目中，我们打算通过两个不同的改进来解决这些问题：（a）通过描述宏观轮胎模型和轮胎胎面与路面的详细细观机械接触行为的相互作用的随机激励函数来扩展该方法;（B）包括橡胶化合物中的动态硬化效应。计划的多级随机方法占粗糙表面的随机过程的性质，因此将能够预测滚动噪声在各种表面特性。因此，随机格式将满足轮胎工业的要求，参数模型能够识别表面参数对轮胎振动行为的影响。

In previous investigations on the high-frequency noise radiated from rolling tires using detailed finite element models, we obtained qualitatively accurate results. However, we identified two issues: the eigenfrequencies computed are lower than those observed in experiments, and the influence of road texture is not fully understood. In the proposed project, we intend to remedy these issues by making two distinct improvements: (a) extending the method by a stochastic excitation function describing the interaction ofthe macroscopic tire model and the detailed meso-mechanical contact behavior of the tire tread with the road surface; (b) including dynamic stiffening effects in the rubber compound. The planned multilevel stochastic approach accounts for the random process nature of rough surfaces and will therefore be capable of predicting rolling noise across a variety of surface characteristics. The stochastic scheme will therefore satisfyrequests from tire industry for a parametric model capable of identifying effects of surface parameters on the tire vibration behavior.