本文在对履带车辆作用下的土壤进行分析和实验后,指出:在履带车辆的作用下,土壤中将出现一滑移层,形成夹层结构。考虑到滑移层内的应变速率大于其他地方,根据Lagrange 方程,导出了含有速度项的有限元方程,来描述这种滑移层;并对阻尼项系数μ的确定,做了一些探讨,从而为计算机模拟滑移层结构提供了理论依据。对实验结果的分析表明:这种假设是符合真实情况的。 After analyzing and experimenting on the soil under the action of the tracked vehicle, this paper points out that under the action of the tracked vehicle, a slip layer will appear in the soil to form a sandwich structure. Taking into account that the strain rate in the slip zone is greater than that of other places, the finite element equation with velocity term is deduced according to the Lagrange equation to describe this slip zone. Some discussions are made on the determination of damping coefficient μ It provides a theoretical basis for computer simulation of slip-layer structure. The analysis of the experimental results shows that: This assumption is in line with the real situation.