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Granular material buffer performance measuring system

A measurement system and technology of granular materials, applied in the field of vertical impact, can solve the problem of rare buffering characteristics of granular materials, and achieve the effect of simple and convenient operation

Inactive Publication Date: 2015-10-07
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the work on the energy dissipation of particulate matter is mainly limited to numerical simulation calculations. Related experimental studies include: Energy dissipation of particulate matter excited by vertical vibration; Peng Zheng, Jiang Yimin, Liu Rui, Hou Meiying; Acta Physica, 2013 ,62(2):1-5; Research on Energy Dissipation of Granular Matter under Micro-shear Vibration; Wang Panpan, Wang Wanjing, Liu Changsong, Zhu Zhengang; Rock and Soil Mechanics, 2009,30:129-134; but about impact load However, little research has been done on the buffering properties of particulate matter under the action of

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Embodiment Construction

[0021] The specific installation process and implementation manner of the present invention will be further described below in conjunction with the drawings and technical solutions.

[0022] figure 1 Firstly, the cross bar 5 is fixed on the vertical bars A1, A2 through the cross clamps C1 and C2; the force sensors C1-C3 are installed at the bottom of the cylinder 1, the acceleration sensor 3 is fixed above the impact object 2, and the sensor passes through L5. The wire is connected to the dynamic data acquisition instrument; one end of the thin wire is connected to the impact object, and the other end is fixed on the crossbar. The connection of the thin wire must ensure that the center of gravity of the acceleration sensor and the impact object is on the same straight line as the thin line. The eccentricity occurs to prevent the impact object from turning over during the fall; the camera is placed at an appropriate position from the particle impact system, so that the changes in t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00
Inventor 季顺迎樊利芳陈晓东
Owner DALIAN UNIV OF TECH
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