岩土力学2024，Vol.45Issue(5)：1560-1569,10.DOI:10.16285/j.rsm.2023.0813
离心-科氏复合条件下体积对滑坡碎屑流流动性的影响研究
Volume effect on flowability of debris avalanche under centrifugal-Coriolis hybrid conditions
摘要
Abstract
The Coriolis effect has gradually become one of the key challenges limiting the use of geotechnical centrifuges to handle high-speed debris avalanche disasters.In particular,there is still a lack of in-depth research on the Coriolis effect involved in the study of how volume affects the flowability of debris avalanche based on centrifugal testing.To tackle this issue,a series of centrifuge modeling tests and DEM simulation tests are conducted,and the influence of different initial volumes on the flowability of debris avalanche under various Coriolis conditions is analyzed.The results indicate that the Coriolis force changes the conversion efficiency from potential energy to kinetic energy of debris avalanche and the magnitude of the final transport distance being enhanced with increasing volume.The behavior of debris avalanche with different volumes under Coriolis conditions is controlled by the inertial flow mechanism and particle-agitation restraint mechanism as well as the transition between these two mechanisms.Considering the practicality,it is recommended to ensure that the flow direction is the same as the rotation direction of the centrifuge as much as possible in the physical centrifuge test,while a linear model can be used to calibrate the experimental results.关键词
滑坡碎屑流/科氏效应/体积效应/离心模拟/离散元模拟Key words
debris avalanche/Coriolis effect/volume effect/centrifuge modeling/discrete element modeling分类
建筑与水利引用本文复制引用
张贝,李文阳,毕研栋,黄雨..离心-科氏复合条件下体积对滑坡碎屑流流动性的影响研究[J].岩土力学,2024,45(5):1560-1569,10.基金项目
国家自然科学基金重点项目(No.41831291) （No.41831291）
中央高校基本科研业务费项目(No.300102263102).This work was supported by the Key Program of National Natural Science Foundation of China(41831291)and the Fundamental Research Funds for the Central Universities(300102263102). （No.300102263102）
