Thoesen Andrew, McBryan Teresa, Marvi Hamidreza
School for Engineering of Matter, Transport and Energy (SEMTE), Arizona State University Tempe Arizona USA
RSC Adv. 2019 Apr 23;9(22):12572-12579. doi: 10.1039/c9ra00399a. eCollection 2019 Apr 17.
This study discusses the role and function of helical design as it relates to slippage during translation of a vehicle in glass bead media. We show discrete element method (DEM) and multi-body dynamics (MBD) simulations and experiments of a double-helix Archimedes screw propelled vehicle traveling in a bed of soda-lime glass beads. Utilizing granular parameters from the literature and a reduced Young's modulus, we validate the set of granular parameters against experiments. The results suggest that MBD-DEM provides reliable dynamic velocity estimates. We provide the glass, ABS, and glass-ABS simulation parameters used to obtain these results. We also examine recently developed granular scaling laws for wheels applied to these shear-driven vehicles under three different simulated gravities. The results indicate that the system obeys gravity granular scaling laws for constant slip conditions but is limited in each gravity regime when slip begins to increase.
本研究讨论了螺旋设计在玻璃珠介质中车辆平移过程中与打滑相关的作用和功能。我们展示了双螺旋阿基米德螺旋推进车辆在钠钙玻璃珠床中行驶的离散元法（DEM）和多体动力学（MBD）模拟及实验。利用文献中的颗粒参数和降低的杨氏模量，我们通过实验验证了颗粒参数集。结果表明，MBD - DEM提供了可靠的动态速度估计。我们提供了用于获得这些结果的玻璃、ABS和玻璃 - ABS模拟参数。我们还研究了最近为车轮开发的颗粒缩放定律，将其应用于在三种不同模拟重力下的这些剪切驱动车辆。结果表明，该系统在恒定打滑条件下遵循重力颗粒缩放定律，但当打滑开始增加时，在每个重力状态下都受到限制。
