Ultrahigh-speed debris flow impact simulation platform and test method under weak Coriolis effect

Abstract

The invention provides an ultra-high-speed debris flow impact simulation platform and method under a weak Coriolis effect. The ultra-high-speed debris flow impact simulation platform used under the weak Coriolis effect comprises a centrifugal machine, a test platform and a debris flow impact simulation mechanism. The debris flow impact simulation mechanism comprises an air box set, an electromagnetic valve module, a sliding groove-blocking device, a magnetic floating device, a soil body material box device, a soil body material box pneumatic acceleration-deceleration device and a gate opening and closing control device. The method comprises the steps of device performance calibration and impact test simulation. The Coriolis effect problem in the traditional centrifugal simulation high-speed geological process is well solved, support can be provided for research of related geological disasters on the structure impact effect, comparison can be provided for simulation of related problems of the ultra-high-speed geological process in a more complex centrifugal-Coriolis composite environment, and the method is used for evaluating the influence of the Coriolis effect.

Description

technical field [0001] The invention relates to a platform and method for impact simulation of ultra-high-speed debris flow under weak Coriolis effect, which can be applied to a physical simulation platform for geological disasters. Background technique [0002] Landslide debris flow is a geological disaster with ultra-high velocity (up to tens of meters per second) and ultra-long movement distance, which causes serious impact damage to engineering structures along the way, resulting in huge economic losses and casualties. The impact failure mechanism of ultra-high-speed debris flow in landslides is an important scientific issue in the field of engineering geology. One of the severe challenges in experimental research is the lack of physical simulation tests that can reflect the ultra-high-speed characteristics of landslide debris flow and the deformation characteristics of rock and soil materials. device. Geotechnical centrifuges provide possible ideas for solving the abov...

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Problems solved by technology

[0003] (1) To realize the weak Coriolis effect, the movement direction of the debris flow is consistent with the direction of the centrifuge rotation angular velocity vector, but in this case, the movement of the debris flow is only driven by 1g of gravity. Due to the small scale of the model, the debris flow Difficult to achieve high speed;

[0004] (2) The movement resistance of the debris flow is still controlled by the high-magnitude field, so the huge base friction makes it difficult to accelerate the soil. For example, under the gravity of 1g, the friction force of the object on the base is 100N, and the acceleration can be achieved if the thrust is greater than 100N; but Under the supergravity environment of 50g, under the condition that the friction coefficient does not change much, the frictional resistance of the same object increases by 50 times, and the thrust to achieve acceleration also increases by 50 times, and the difficulty of realizing the acceleration of the object increases sharply

[0005] In the prior art, there is no method and platform in this field that can be used to simulate the impact of ultra-high-speed debris flow under the weak Coriolis effect

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