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Building method of discrete element module of true aggregate particles based on X-ray CT image

A particle discrete element and construction method technology, applied in the field of real aggregate particle discrete element model construction, can solve problems such as low fitting accuracy and large number of model units

Inactive Publication Date: 2015-05-06
HEFEI UNIV OF TECH
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for constructing a real aggregate particle discrete element model based on X-ray CT images, so as to solve the problem of the low fitting precision of the aggregate particle discrete element model in the prior art to the real shape of the aggregate particle and the The problem with the huge number of units

Method used

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  • Building method of discrete element module of true aggregate particles based on X-ray CT image
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  • Building method of discrete element module of true aggregate particles based on X-ray CT image

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Embodiment Construction

[0085] A method for constructing a discrete element model of real aggregate particles based on X-ray CT images, comprising the following steps:

[0086] (1) Using the X-ray CT grayscale image file group of asphalt mixture specimens in BMP format, with a resolution of 512×512 pixels and a certain scanning interval as the data source, select an aggregate particle and intercept it in each scanned image The projected block in and saved as a grayscale image file group Aggregate[n] in BMP format to reconstruct the solid model of the aggregate particle, where:

[0087] Asphalt mixture test piece refers to a cylindrical sample that is prepared with asphalt material and aggregate in an appropriate proportion and cemented into a whole. The radius is recorded as radius and the height is height;

[0088] The X-ray CT grayscale image file group refers to the cross-sectional scanning image array obtained by using X-ray CT equipment to scan the asphalt mixture specimen at a certain longitudi...

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Abstract

The invention discloses a building method of a discrete element module of true aggregate particles based on an X-ray CT image which is provided to the aggregate particles in a bituminous mixture test piece of numerical analysis of a bituminous mixture, so as to realize that the discrete element module of true aggregate particles with highly fitted geometrical shape of a true aggregation and the minimal quantity of discrete elements can be automatically built. According to the building method provided by the invention, based on the discrete element analysis of the bituminous mixture test piece in a microstructure, the automatic switching between the X-ray CT section image of the bituminous mixture test piece and the discrete element module of true aggregate particles with precisely fitted geometrical shape of the true aggregation and the minimal quantity of discrete elements can be completed to assist the building of the discrete element module of the bituminous mixture test piece.

Description

technical field [0001] The invention relates to the field of numerical analysis, in particular to a method for constructing a discrete element model of real aggregate particles based on X-ray CT images. Background technique [0002] Three-dimensional mesomechanical analysis technology is an important technology to evaluate the macroscopic pavement performance of asphalt pavement by studying the internal mesostructure of asphalt mixture. Among them, the establishment of a three-dimensional numerical model that can reflect the real mesoscopic composition of the road test specimen is an important prerequisite for obtaining credible analysis results. [0003] Among the numerical analysis methods, the discrete element method has obvious advantages in accurately simulating the deformation, cracking and other mesomechanical behavior of asphalt mixture. Since the aggregate particles inside the mixture occupy a large proportion of the mixture components, its geometry has an importan...

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 金灿张卫华刘凯
Owner HEFEI UNIV OF TECH
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