中文摘要：

在对车辆地面力学中轮胎和地面模型研究的基础上，针对各种模型的局限性，运用散体单元法（DEM）理论，建立了轮胎与地面的系统力学模型,提出了颗粒轮胎与颗粒地面概念；对轮胎在选定地面上行驶时，表层土壤的应力分布进行了模拟分析计算，并将计算结果与相关文献的研究成果进行了比较分析。

英文摘要：

Based on the model of the ground and tyre in terra-mechanics, and due to the limitation of various models, the concept of the granule tyre and granule ground are put forward, the systematic mechanics model of tyre and ground with the Discrete Element Method （DEM） is established. The stress distributions of top soil while tyre is going on the selected ground is simulated and analysed. The result is comparatived with the results of relevant references.