Investigation on the Coriolis effect in centrifuge modeling of the impact process of high-speed debris avalanche
Geotechnical centrifugal simulation is an important technology in civil engineering,geological engineering and other related fields.But the better use of centrifuge is still challenged when dealing with high-speed debris avalanche,because the Coriolis effect cannot be avoided and lacks thorough investigations.In this paper,especially focusing on the impact effect of high-speed debris avalanche,which is an important problem in disaster prevention and mitigation engineering,a series of physical centrifugal tests and numerical tests are carried out.The results indicate that the direction of Coriolis acceleration has a more significant influence on the impact process of high-speed debris avalanche,and the dilative Coriolis effect strengthens the interaction between the debris avalanche and the barrier structure,and the influence is characterized by higher flow mobility,stronger impact effect and larger accumulation height.The influence of centrifugal stress level on the compressive Coriolis effect is more significant.With the increase of centrifugal stress level,the simulation results are more similar to the results without the influence of Coriolis effect.As a result,the geotechnical centrifuge modeling of the impact process of high-speed debris avalanche is suggested to be conducted under dilative Coriolis condition,and it is not necessary to deliberately select a small centrifugal stress level.
centrifuge modeling technologyhigh-speed debris avalancheimpact processCoriolis effectdiscrete element simulation
万方数据
维普
