Granular material buffer performance measuring system

Abstract

The invention provides a granular material buffer performance measuring system. A granular substance is a rapid energy dissipating system, and energy is consumed mainly through intergranular non-elastic collision and sliding friction, and an intergranular force chain structure can increase the action area and the action time of external load, so impact load is certainly buffered, and destroys brought by the impact are reduced. The measuring system is composed of a fixed support, a granule impact system, a mechanical response measuring system and an image acquisition system, so vertical impact to the granular substance is realized, the acceleration of an impact substance and the impact force born by a baseboard can be accurately measured, the change of the surface form of the granule and the movement of the impact substance in the impact process is recorded, and a reliable device is provided for accurately measuring the buffer performance of the granular substance. The device can realize control and adjustment of the thickness of a granule layer and the impact height, and the influences of the thickness of the granule layer and the impact height on the buffer characteristic of the granule layer are researched.

Description

Technical field

[0001] The invention provides a measuring system for the cushioning performance of granular materials, which belongs to the field of vertical impact, and relates to how to accurately measure the cushioning performance of granular materials under the action of vertical impact. Background technique

[0002] Particulate matter is a fast energy dissipation system, which consumes energy mainly through sliding friction and inelastic collisions between particles. Under the action of external load, the complex internal force chain structure between particles breaks and reorganizes, which consumes a lot of energy. At the same time, the force chain structure can expand the space and time of the instantaneous local impact load, so as to achieve a good buffer effect. At present, the work on energy dissipation of particulate matter is mainly limited to numerical simulation calculations. Related experimental studies include: energy dissipation of particulate matter excited by v...

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