Evaluation of vertical stress distribution in clay-loam soil using Smoothed-Particle Hydrodynamics-Finite Element Analysis (SPH-FEA) technique is presented in this research. The moist soil is modelled using the hydrodynamic elastic–plastic material and Murnaghan equation of state, while the tire is modelled using FEA in Visual Environment’s Pam-Crash software. Soil-tire interaction is performed using the node symmetric node to segment with edge treatment method. A single-wheel tester in a soil bin environment was utilized to provide experimental data. The objectives of the experimental test were to (1) calculate maximum subsoil stresses in the subsoil at 1 to 15 passes of a wheel with loads of 1, 2, 4, and 5 kN on soil with moisture levels of 0, 10, 17, and 24%.; (2) calibrate soil with different levels of moisture (3) compare predicted soil stresses with experiments. The maximum stress at 20 cm depth increased with increasing soil moisture and also with high levels of tire load. In contrast, successive traffic showed a decreasing effect on soil stress. The coefficient of determination 0.97 shows the predictions agreed very well with experiments. The moist soil-tire interaction model will be further used to analyze the soil stress in different soil depths and different forward velocity.

本研究提出了利用光滑颗粒流体动力学有限元分析（SPH-FEA）技术评估黏土壤土中的垂直应力分布的方法。使用流体动力弹塑性材料和Murnaghan状态方程对潮湿的土壤进行建模，而使用Visual Environment的Pam-Crash软件中的FEA对轮胎进行建模​​。利用节点对称节点通过边缘处理方法进行土壤-轮胎相互作用。利用土壤箱环境中的单轮测试仪提供实验数据。实验测试的目的是（1）计算在土壤湿度为0、10、17、1、2、4和5 kN的车轮经过1到15次通过后，底土中的最大底土应力。和24％。（2）校准不同湿度的土壤（3）将预测的土壤压力与实验进行比较。20 cm深度的最大应力随着土壤湿度的增加以及轮胎负荷的增加而增加。相反，连续的交通运输对土壤压力显示出减小的影响。确定系数为0.97，表明预测与实验非常吻合。湿土-轮胎相互作用模型将进一步用于分析不同土壤深度和不同前进速度下的土壤应力。