Modeling method for single-particle discrete element numerical sample with random shape
A modeling method and discrete element technology, applied in design optimization/simulation, etc., can solve problems such as difficult randomization of particle shapes, and achieve the effects of ensuring controllability, easy implementation, and simple and efficient algorithms
Inactive Publication Date: 2020-01-14
XIANGTAN UNIV
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[0004] The purpose of the present invention is to propose a single particle discrete element numerical sample modeling method with random shape, by randomly deleting the particles at the boundary position of the spherical particle aggregate to construct a single particle with complex shape, so as to solve the problem that the particle shape is difficult to randomize problems, and provide an effective technical means for further research on the influence of particle shape on the mechanical behavior of granular materials
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[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings and embodiments.
[0032] The specific process of a single particle discrete element numerical sample modeling method with random shape is as follows: figure 1 shown, including the following steps:
[0033] a. Set the boundary of the calculation area: construct a rectangular calculation area with a length, width and height of 20 mm.
[0034] b. Generate spherical particle aggregates: construct a spherical region with a sphere as the origin of coordinates and a radius of 5 mm, and fill the constructed spherical region with small spherical particles with a particle radius of 0.1 mm;
[0035] In the present invention, the porosity of the spherical particle aggregate is 0.2, and the number of small particles as a whole is 13100. The spherical parti...
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The invention discloses a modeling method for a single-particle discrete element numerical sample with a random shape, which is used for constructing an irregular-shaped single-particle numerical sample by deleting any number of particles at any boundary position of a spherical particle assembly, and comprises the following steps of: setting a boundary of a calculation region; generating the spherical particle aggregate; setting a contact model; eliminating the action effect among the particles; generating a random-shaped particle aggregate; resetting a contact model. The method is simple, convenient and efficient, based on a discrete element method, the construction of a single-particle numerical sample with a random shape is realized, and an effective technical means is provided for further researching the influence of the particle shape on the mechanics and deformation behaviors of the particle material.
Description
technical field [0001] The invention relates to a numerical calculation method of geotechnical engineering, in particular to a modeling method of a single-particle discrete element numerical sample with a random shape, and belongs to the field of numerical calculation of geotechnical engineering. Background technique [0002] Granular materials are very common in nature, such as soil particles, sand particles, and rock fragments. In the process of engineering construction, the building materials used are often natural granular materials. For engineering granular materials, in addition to their own physical components and particle size, the particle shape will also have a very significant impact on their mechanical properties. , thus further affecting the overall safety and reliability of the construction project. Due to the effect of the complex natural environment, the shape characteristics of engineering granular materials are usually complex and not regular spherical. Fo...
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IPC IPC(8): G06F30/20
Inventor 龙志林旷杜敏邓锐杰周煦桐王洁段辉宇王卓夫贺剑鑫
Owner XIANGTAN UNIV