粒状体の撹拌を用いた減衰に関する研究

抄録

In this study, we present theoretical and analytical results of damping force induced by stirring in granular materials. In the experiment, a vertical cylinder stirred by a vertical blade was used and it was partially filled with granular materials made of PMMA. The torque induced by stirring and the blade angle were measured with a torque sensor and an angle sensor, respectively. The angular amplitude of the stirring blade was fixed at 30 degrees and the vibration frequency was changed from 1 Hz to 5 Hz. In addition, the behavior of granular materials was calculated using the discrete element method. The validity of using the numerical method to determine the relationship between the blade angle and the torque was examined by comparison with experimental results. It was found that the numerical approach is effective for estimating the relationship between the blade angle and the torque.