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Method for constructing particle cluster discrete element model of convex polyhedral aggregate in any shape

A convex polyhedron, arbitrary shape technique, applied in the field of particle cluster discrete element model construction

Active Publication Date: 2016-09-07
HOHAI UNIV
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  • Application Information

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Problems solved by technology

According to the available literature, there is no method that can accurately describe the shape of convex polyhedral aggregates.

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  • Method for constructing particle cluster discrete element model of convex polyhedral aggregate in any shape
  • Method for constructing particle cluster discrete element model of convex polyhedral aggregate in any shape
  • Method for constructing particle cluster discrete element model of convex polyhedral aggregate in any shape

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Embodiment Construction

[0069] Below with reference to accompanying drawing, the concrete implementation process of described step of the present invention is made a detailed statement:

[0070] See also shown in Fig. 21, in order to realize the present invention, described a kind of particle cluster (Cluster) discrete element model construction method of convex polyhedral aggregate of arbitrary shape, in step 1, to the boundary of the convex polyhedral aggregate of arbitrary shape The model performs topology information retrieval and builds the topology information base of the model.

[0071] In the present invention, the polyhedral aggregate adopts boundary representation (Boundary representation) to describe its actual shape. The polyhedral boundary model is composed of basic elements such as vertices, edges, and triangular faces. According to the topological relationship of the polyhedral boundary model, a special topological information is established. Library for easy retrieval of data in subse...

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Abstract

The invention discloses a method for constructing a particle cluster discrete element model of a convex polyhedral aggregate in any shape. The method comprises the following steps of performing topological information retrieval on a boundary model of the convex polyhedral aggregate in any shape, and establishing a topological information library of the model, wherein the topological information library includes a vertex information library, an edge information library and a surface information library; and performing retrieval on the surface information library, the edge information library and the vertex information library separately, traversing all triangular surfaces, all edges and all vertexes of the model, and putting spheres on the surfaces, the edges and the vertexes in sequence until the spheres cannot be successfully put on the surfaces, the edges and the vertexes. The method for constructing the particle cluster discrete element model of the convex polyhedral aggregate in any shape is simple in thought, easy to realize by programming and relatively small in computing error, and a deformation law better conforms to a deformation state of an actual test piece; and through simulation experiment analysis, the effectiveness and high-precision characteristic of the method for constructing the particle cluster discrete element model are verified.

Description

technical field [0001] The invention relates to a method for constructing a discrete element model of a particle cluster of a convex polyhedral aggregate of arbitrary shape. Background technique [0002] Particle discrete element is a discontinuous numerical simulation method, which has been widely used in the field of particle system research. At first, considering the complexity of judging the contact between real particles, the particles were simplified as spheres during the simulation. However, a large number of studies have shown that the shape of the particle has an important influence on the behavioral response of the particle system. In order to accurately obtain the behavioral response of the particle system, many researchers try to approximately consider the actual shape of the particle during the simulation process. [0003] Currently, a popular approach is to rigidly connect many spheres as a particle cluster to approximate the actual particles. The advantage ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 张强张久长徐卫亚王伟石崇王如宾孟庆祥王盛年
Owner HOHAI UNIV
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