Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method

A technology of asphalt pavement and mesoscopic structure, applied in image data processing, instruments, etc., can solve the problems of not reflecting the characteristics of mesh division of different materials, increasing the amount of calculation and storage, etc.

Active Publication Date: 2012-10-31
HEFEI UNIV OF TECH
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Problems solved by technology

There are two key issues: one is which parameters to choose as the mesoscopic modeling parameters of aggregate particles; the other is how to obtain the modeling parameters
However, the surface information of the visualized model used is too fine, and the fine uniform meshing method adopted does not reflect the meshing characteristics of different materials, and will greatly increase the amount of calculation and storage

Method used

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  • Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method
  • Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method
  • Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method

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Embodiment Construction

[0077] A method for reconstructing aggregate mesostructure based on X-ray CT images of asphalt pavement test specimens, including the following steps:

[0078] (1) Input the grayscale image file group graph[n] in BMP format, which stores the X-ray CT cross-sectional image of the asphalt pavement specimen with a scanning step size of space, and its resolution is 512×512 pixels, as the aggregate entity Data sources for model reconstruction;

[0079] A grayscale image file refers to an image file obtained by weighting the color component values ​​of pixels in a color image according to a certain ratio and attaching the weighted value to each color component. The grayscale of all pixels in a grayscale image is between Between 0 and 255;

[0080] Asphalt pavement test specimen refers to a cylindrical sample of pavement that is prepared with asphalt materials and aggregates in an appropriate proportion and cemented into a whole. The radius is recorded as radius and the height is he...

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Abstract

The invention discloses a bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method, which is applied to virtual value analysis for solid model reconstruction of an aggregate mesoscopic structure in a bituminous pavement test piece and realizes automation of three-dimensional modeling of coarse aggregates in the test piece. The method is based on the mesoscopic value analysis for the bituminous pavement test piece-based reconstruction model, and realizes automatic conversion from the bituminous pavement test piece X-ray CT section image to the aggregate solid model, so as to assist in the establishment of a bituminous mixture mesoscopic solid model.

Description

technical field [0001] The invention relates to the field of numerical analysis, in particular to a method for reconstructing an aggregate mesoscopic solid model based on an X-ray CT image of an asphalt pavement test piece. Background technique [0002] The mesoscopic analysis of asphalt concrete pavement is one of the important application methods of finite element analysis. However, the heterogeneous composite of the specimen makes it show complex macroscopic properties. It is very necessary to observe the three-dimensional model and carry out mesoscopic numerical simulation. However, the aggregate particles in the test piece, as the largest component of the test piece, have extremely complex geometric shapes and distribution rules, and it is difficult to obtain the corresponding mesoscopic model through the modeling module of the finite element software itself. Therefore, the aggregate numerical model suitable for finite element analysis must be obtained by other means. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/00
Inventor 金灿张卫华刘凯
Owner HEFEI UNIV OF TECH
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