轮胎-沥青路面接触效应数值分析

Numerical Analysis on Contact Effect of Tire-asphalt Pavement Structure

针对轮胎-沥青路面接触效应问题，传统上基于多层弹性理论的双圆简化模式的分析精度是十分有限的。为了分析轮胎-沥青路面结构的实际接触效应，通过三维有限元数值方法，分析了一种典型沥青路面结构在非均布轮胎-路面三向接地压力作用下的Mises应力、剪应力和拉应力。研究表明，在非均布轮胎-路面三向按地压力作用下，该典型沥青路面结构在轮胎边缘处存在较高水平的剪切应变能和较大的剪应力，在轮胎横向五个矩形接触区域内明显存在五个拉应力峰值，与圆形均布荷载作用下的力学响应存在很大差别。

According to the problem of the contact effect of tire - asphalt pavement structure, owning to the analysis accuracy of the simplified two - round model based on the traditional multi - layer elastic theory is very limited. In order to test the practical contact effect of tire - asphalt pavement structure, mises stress, shear stress and tensile stress of a typical asphalt pavement structure has been analyzed by using of the 3 - D finite element method, under the action of non - uniform 3 - D load,. The result shows that, under the action of non - uniform 3 - D load, there are higher level of shear strain energy and greater shear stress in the tire edge of the typical asphalt pavement structure, there are five peaks of tension stress in the transverse five rectangular contact area of the tire - asphalt pavement struvture and its mechanical response is very different from that of the round uniform load.