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Discrete element method based method for improving particle discrete contact detection efficiency

A technology of discrete element method and detection efficiency, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve time-consuming and other problems

Inactive Publication Date: 2014-08-13
李笑宇 +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the search for contact retrieval relations is still the most time-consuming part of granular DEA

Method used

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  • Discrete element method based method for improving particle discrete contact detection efficiency
  • Discrete element method based method for improving particle discrete contact detection efficiency
  • Discrete element method based method for improving particle discrete contact detection efficiency

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1-3 Shown is a method based on the discrete element method to improve the efficiency of particle discrete contact detection. By solving the maximum number of particles in contact with a certain particle at a certain time, the process is to rely on a simple geometric model to determine the maximum number of particles around a particle (circle or sphere). For particles in contact, when simulating the static and moving behavior of particles, it is necessary to calculate the contact force according to the amount of overlap between particles, and then calculate the speed and position of each particle, and frequently calculate whether the particles overlap. The process is:

[0031] (1) Two-dimensional case (round particles)

[0032] For two-dimensional particles, when retrieving a particle in contact with other particles, the traditional simulation calculatio...

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Abstract

The invention discloses a discrete element method based method for improving the particle discrete contact detection efficiency and belongs to the technical field of particle discrete element model construction. The discrete element method based method for improving the particle discrete contact detection efficiency is achieved by solving the number of contactable particles of one particle at a moment. Used mathematic models in the discrete element method based method are simple geometric models, the relationship between the number of contactable particles and the semi-diameter of the central particle and contact particles is obtained due to calculation of the geometric models, calculation times are reduced due to the fact that relational expressions are added to a program, then the program for simulating the calculation is out of the loop, the calculation times are reduced, and the efficiency is improved. Compared with the existing models, the calculation amount in the discrete element method based method is effectively reduced and simulation calculation of numerical values in large scale can be performed through common devices.

Description

technical field [0001] The invention belongs to the technical field of particle discrete element model establishment, and in particular relates to a method for improving particle discrete contact detection efficiency based on a discrete element method. Background technique [0002] Discrete element method is a kind of particle discrete material analysis method first proposed by American scholar Cundall P.A. based on the principle of molecular dynamics. It is a numerical method for displaying solutions. Since it was proposed, it has played an irreplaceable role in other numerical algorithms in the two traditional application fields of geotechnical engineering and discrete body engineering. The discrete element method regards the medium as composed of a series of discrete independent moving units, establishes a mathematical model according to the discrete characteristics of the discrete matter itself, and regards the object to be analyzed as a collection of discrete particles....

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李笑宇赵博宇
Owner 李笑宇
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