The investigation presented addresses the response of a compliant wheel in interaction with deformable soil dependent on the water content, and accordingly on soil consistency. Two fine soils are considered. The basic soil properties and the soil shear strength are obtained from routine tests. A non-pneumatic Tweel in full size is tested in a loading device against a rigid base and against soil placed in a container in order to assess its stiffness and the compressional behavior of the soil, respectively. The measured pressure sinkage curves are then utilized in conjunction with a standard explicit FEM code to calibrate a hyperelastic model for the Tweel and an elasto-plastic constitutive model for the soil. Soil-tire interface strength is obtained from shear tests on a flat tire section embedded in soil. The numerical model is then applied to investigate how the water content affects the global response of the tire-soil system under different scenarios of free rolling, braking and driving. The methodology followed, complemented by appropriate soil testing, can be used as guide for the implementation of more elaborate models.

提出的研究解决了依从性车轮与可变形土壤相互作用的响应，该响应取决于含水量，并因此取决于土壤的稠度。考虑了两种细土。基本的土壤特性和抗剪强度可通过常规测试获得。在装载设备中针对刚性底座和放置在容器中的土壤测试了全尺寸的非气动Tweel，以便分别评估其刚度和土壤的压缩性能。然后，将测得的压降曲线与标准的显式FEM代码结合使用，以校准Tweel的超弹性模型和土壤的弹塑性本构模型。通过对埋在土壤中的flat胎部分进行的剪切测试，可以获得土壤-轮胎界面强度。然后将数值模型应用于研究水含量如何在自由滚动，制动和行驶的不同情况下影响轮胎-土壤系统的整体响应。所采用的方法，再加上适当的土壤测试，可作为实施更精细模型的指南。