Abstract This paper presents an analysis, based on a particle image velocimetry method, of soil flow field beneath a grouser wheel traveling over loose soil. Although the grouser wheel is expected to have better traction and mobility over fine, loose soil, its interaction mechanisms with the soil remain to be elucidated. Thus, a particle image velocimetry-based soil flow analysis is conducted to directly observe soil behavior around the grouser wheel. In the experimental analysis, key parameters of the soil flow field, such as general shape, thickness, streamlines of the flow field, soil velocity on the streamlines, and soil failure angle are examined quantitatively. From the results, the soil flow shape periodically changes with wheel rotation, and this change appears, depending on wheel slip varying over time. Furthermore, the experimental result of the soil failure angle differs drastically from its typical theory. These results will contribute to modeling the mechanical interaction between the grouser wheel and soil.

中文翻译：

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基于粒子图像测速法的履带轮土壤流动分析

摘要 本文基于粒子图像测速法，对松散土壤上履带履带轮下方的土壤流场进行了分析。尽管履带式履带轮有望在细小松散土壤上具有更好的牵引力和机动性，但其与土壤的相互作用机制仍有待阐明。因此，进行了基于粒子图像测速的土壤流动分析，以直接观察履带轮周围的土壤行为。在实验分析中，对土壤流场的关键参数，如流场的总体形状、厚度、流线、流线上的土壤速度、土壤破坏角等进行了定量分析。从结果来看，土流形状随着车轮旋转而周期性地变化，并且这种变化出现，取决于车轮随时间变化的滑移。此外，土体破坏角的实验结果与其典型的理论大不相同。这些结果将有助于模拟履带轮和土壤之间的机械相互作用。