The maximum impact force of granular flow and its action point on a rigid barrier are the key indices of the anti-slip and the anti-overturning calculation, respectively. On the basis of the present impact force models and the observation in model experiments, this paper proposes a new semi-empirical impact force model focusing on the normal impact force and its point of action. By comparing the analytical solution and the experimental results, the new semi-empirical analytical model can estimate the normal impact force composed of both dynamic and static components with an error margin within ± 20% compared with the experimental results and so is for the corresponding point of action and tangential force. To calculate the residual force generated only by the static dead zone, the static friction angle between the dead zone and the chute base should be less than what was measured under kinetic conditions. Based on a large number of tests, it was found that assuming that the reaction force generated by the chute base operates at 2/3 of the deposition length makes the estimated normal impact force best suited to the experimental results.

中文翻译：

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干颗粒流冲击刚性屏障的新半经验冲击力模型的实验验证

颗粒流对刚性屏障的最大冲击力及其作用点分别是防滑和抗倾覆计算的关键指标。在现有冲击力模型和模型实验观察的基础上，本文提出了一种新的半经验冲击力模型，重点关注法向冲击力及其作用点。通过比较解析解和实验结果，新的半经验分析模型可以估计由动态和静态分量组成的法向冲击力，与实验结果相比误差在±20%以内，对应点也是如此。作用力和切向力。计算仅由静态死区产生的残余力，死区和溜槽底部之间的静摩擦角应小于在动力学条件下测得的值。通过大量试验发现，假设斜槽底座产生的反作用力作用在沉积长度的2/3，则估算的法向冲击力最适合实验结果。