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An Infinitesimal Eccentric Rotational Damping Model for Rolling Resistance of Circular Particles

机译:圆形颗粒滚动阻力的无限小偏心旋转阻尼模型

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This study proposes an infinitesimal eccentric and rotational damping (IERD) modelrnto consider the rolling resistance of circle particles through DEM simulation. Thernmass center of circular particle is firstly slightly adjusted to eccentricity for therneffectiveness of rotational spring. Then, a local rotational damping is adopted torndissipate energy in the rotational direction. Compared with the repose angle tests ofrnrod assemblies, the IERD model is verified and the results are quite satisfactory onrnthe small scale model tests. In addition, the simulations using other existing modelsrnwere also carried out and compared. In conclusion, the particle rolling simulationrnusing the proposed model appears to approach the actual particle trajectory, makingrnit useful for applications.
机译:本研究提出了一个无穷小的偏心和旋转阻尼(IERD)模型,以通过DEM模拟考虑圆颗粒的滚动阻力。首先将圆形颗粒的质量中心略微调整为偏心,以提高旋转弹簧的有效性。然后,采用局部旋转阻尼来消散旋转方向上的能量。与杆组件的休止角测试相比,IERD模型得到了验证,在小规模模型测试中,结果令人满意。此外,还进行了使用其他现有模型的仿真并进行了比较。总之,利用所提出的模型进行的粒子滚动模拟似乎逼近了实际的粒子轨迹,使其实用化。

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