论文标题
在撞击下密集的悬浮液中有效的粘度和弹性：朝着悬挂的行走建模
Effective viscosity and elasticity in dense suspensions under impact: Toward a modeling of walking on suspensions
论文作者
论文摘要
使用耦合的晶格Boltzmann方法和离散元素方法（LBM-DEM）及其还原模型研究了撞击下密集悬浮液的弹性响应。我们成功地提取作用在撞击器上的弹性力，即使没有渗透悬浮颗粒的簇簇也可以存在。然后，我们提出了一个简化的模型来描述影响器的运动，并通过比较还原模型的解和LBM-DEM的解决方案来证明其相关性。此外，我们说明对减少模型的扰动分析捕获了撞击器运动的短时行为。我们将这种简化的模型应用于脚弹性系统对密集悬架的影响，这是实现悬架行走的最小模型。由于系统的弹簧力和悬架的刚度，脚发生了多次弹跳。我们还研究了跳跃运动的参数依赖性，并发现随着弹簧刚度的增加，多个弹跳被抑制。
The elastic response of dense suspensions under an impact is studied using coupled Lattice Boltzmann Method and Discrete Element Method (LBM-DEM) and its reduced model. We succeed to extract the elastic force acting on the impactor in dense suspensions, which can exist even in the absence of percolating clusters of suspended particles. We then propose a reduced model to describe the motion of the impactor and demonstrate its relevancy through the comparison of the solution of the reduced model and that of LBM-DEM. Furthermore, we illustrate that the perturbation analysis of the reduced model captures the short-time behavior of the impactor motion quantitatively. We apply this reduced model to the impact of the foot-spring-body system on a dense suspension, which is the minimal model to realize walking on the suspension. Due to the spring force of the system and the stiffness of the suspension, the foot undergoes multiple bounces. We also study the parameter dependencies of the hopping motion and find that multiple bounces are suppressed as the spring stiffness increases.
