Particle dynamic response test device and method based on electromagnetic control

Abstract

The invention provides a particle dynamic response test device and method based on electromagnetic control. An interference-free particle column natural collapse test can be realized, and accurate andreal test data can be obtained. The particle dynamic response test device comprises a plurality of particle units, wherein each particle unit comprises an embedded body capable of generating magnetism under the action of electromagnetism and a wrapping body wrapping the embedded body in a sealed mode; a particle flowing groove provided with a groove body used for containing the particle units fortesting, wherein one side of the groove body serves as an adsorption side, and the other side of the groove body is transparent and serves as an observation side; a baffle component matched with theparticle flowing groove, wherein the baffle component and the particle flowing groove jointly define a space for arranging and stacking the multiple particle units; and an electromagnetic chuck arranged on the adsorption side of the particle flowing groove, wherein the particle units are adsorbed to the adsorption side of the particle flowing groove by generating electromagnetic force to form stable particle columns, and the particle columns freely collapse by removing the electromagnetic force.

Description

technical field [0001] The invention belongs to the field of research on dynamic characteristics of granular materials, and in particular relates to a particle dynamic response test device and method based on electromagnetic control. Background technique [0002] The flow of granular materials is a very common phenomenon, which occurs in various forms in nature, such as phenomena caused by natural factors such as landslides, avalanches of weathered rock debris, or grain flow in granaries, rockfill dams, etc. The phenomena caused by human production and life, such as the movement of rockfill materials, all belong to the flow of granular materials. Compared with ordinary liquids and solids, which mainly involve the two spatial levels of microscopic molecular electronic movement and macroscopic movement, granular materials also have a mesoscopic structural level with particle size as the characteristic length. It is clear that its motion and mechanical properties are also very...

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Problems solved by technology

[0012] 3. Although the baffles can be used to restrain and release the particle column, most of the experimental devices adopt different lifting methods, and basically use the rapid lifting baffle to realize the collapse of the particle column, but the problem of the rapid lifting baffle is that There is no guarantee that the initial speed and the average speed are consistent each time, so it will affect the results of the test

[0013] 4. Most of the test devices do not consider or cannot allow the particles to self-adjust to eliminate some unstable contacts or gaps between the particles after the particle column is piled up.

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