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Aggregate three-dimensional structure discrete element generating method

A three-dimensional shape, discrete element technology, applied in the direction of analysis of materials, instruments, etc., can solve the problem of not being able to establish contact with actual aggregates

Active Publication Date: 2013-08-07
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

However, the existing random aggregate generation methods can only generate idealized aggregate particles, and cannot establish a relationship with the actual aggregate.

Method used

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  • Aggregate three-dimensional structure discrete element generating method
  • Aggregate three-dimensional structure discrete element generating method
  • Aggregate three-dimensional structure discrete element generating method

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Aggregate three-dimensional shape discrete element generation method, the aggregate particles are set as a hexahedron, pentahedron or tetrahedron formed by arranging several layers of spheres of equal particle size regularly, and at least There are three sides perpendicular to each other, and the three sides have a common endpoint, and the three-dimensional size characteristics of the aggregate particles are characterized by the length of the three sides, so as to include three of the three perpendicular planes of the three sides Angles characterize the angular character of the aggregate particles.

[0015] Taking the hexahedron as a basic structure, the hexahedron has at least one pair of parallel faces, and the two sides of one of the pair of parallel faces are two of the three mutually perpendicular sides, so Two ends of the other of the three mutually perpe...

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Abstract

The invention discloses an aggregate three-dimensional structure discrete element generating method. The method comprises the following steps: setting aggregate particles as a hexahedron, pentahedron or tetrahedron which is formed through several-layer arrangement of spheres having a same particle size, wherein at least three edges of the hexahedron, pentahedron or tetrahedron are mutually perpendicular to each other, and the three edges share an end point; and characterizing the three-dimensional dimension characteristics of the hexahedron, pentahedron or tetrahedron by the lengths of the three edges to include the characterization of the corner angle characteristics of the hexahedron, pentahedron or tetrahedron by three angles in the three vertical plane of the three edges. The aggregate three-dimensional structure discrete element generating method allows the dimension and corner angle parameters of the aggregates to be randomly selected based on the three-dimensional structure data of real aggregates according to the normal distribution, and can stimulate the real shapes, dimensions and the corner angles of the aggregate particles to establish a relationship with the real aggregates.

Description

technical field [0001] The invention relates to a three-dimensional discrete element simulation technology of asphalt mixture, in particular to a three-dimensional form discrete element production method of aggregate. Background technique [0002] When using the discrete element method to simulate the mechanical properties of aggregates or asphalt mixtures, it is first necessary to reconstruct the three-dimensional shape of aggregates in the discrete element program. The morphological characteristics of aggregates have an important influence on the mechanical behavior of aggregates and asphalt mixtures. Therefore, it is very important to accurately model the three-dimensional morphology of aggregates. The three-dimensional morphology of aggregates can be accurately reconstructed using image processing and X-ray scanning techniques. However, this method relies on laboratory equipment. In the actual operation process, it is necessary to prepare aggregate or asphalt mixture ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00
Inventor 黄晓明张东
Owner SOUTHEAST UNIV
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