Random gap generation method for asphalt mixture model

An asphalt mixture, void technology, applied in 3D modeling, material analysis, material analysis using wave/particle radiation, etc., can solve the problem of not considering void distribution, void content can not indicate other characteristics of voids, etc., to achieve numerical model Close to reality, accurate simulation results

Active Publication Date: 2021-02-26
ZHEJIANG UNIV
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Problems solved by technology

[0003] (1) Construct an appropriate equation based on the distance between the center of the random void and the boundary of the aggregate in two dimensions to determine the distance from the center of the random void to the edge of the void. This method describes the shape of the void well, but does not consider the distribution of voids. Affects and only describes the random generation of voids in two dimensions;
[0004] (2) According to the void ratio, randomly delete the voids generated by the glue part. This method is simple, easy to operate, and widely used, but it only considers the influence of void content and cannot reveal other characteristics of voids;

Method used

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  • Random gap generation method for asphalt mixture model
  • Random gap generation method for asphalt mixture model
  • Random gap generation method for asphalt mixture model

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Embodiment

[0031] A kind of asphalt mixture model random void generation method of the present invention, concrete operation is as follows:

[0032] (1) Take the asphalt mixture cylindrical specimen with a height of 100mm and a diameter of 100mm, the radius of the unit sphere is 0.65mm, and the void ratio is 8%. According to the discrete element model of asphalt mixture, the radius of the unit sphere, aggregate information and Dimensions of asphalt mixture specimens Generate an asphalt mixture discrete element model containing aggregate and mortar unit balls. The total number of asphalt mixture discrete element model unit balls is about 720,000, so the number of interstitial unit balls is n=57600 (pieces).

[0033] (2) Use CT to scan the image of the horizontal cross-section of the asphalt mixture, take the radius R=50mm, draw a circle at the center of the circle with a radius of 1 / 4R, 2 / 4R, and 3 / 4R to divide the image into four areas, and according to the position of the gap, Count the...

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Abstract

The invention discloses a random gap generation method for an asphalt mixture model which comprises the following steps: generating a virtual gap structure in an asphalt mixture discrete element modelby means of a dichotomy and an improved region growth algorithm, and generating gaps capable of reflecting the size, shape and distribution characteristics of the gaps in the asphalt mixture discreteelement model of the method. According to the method, the randomly generated asphalt mixture discrete element model is more practical, so that the simulation result is more accurate.

Description

technical field [0001] The invention relates to a method for constructing a simulation model, in particular to a method for generating random voids in an asphalt mixture model. Background technique [0002] In the study of various mechanical properties of asphalt mixtures, numerical simulation methods based on discrete elements have been widely developed. Random generation of aggregates in discrete element models can take into account the gradation composition and surface irregularities of aggregates, but in The random generation of voids in 3D still lacks a better method to reflect the size, content and distribution characteristics of voids at the same time. The existing void generation methods mainly include the following methods: [0003] (1) Construct an appropriate equation based on the distance between the center of the random void and the boundary of the aggregate in two dimensions to determine the distance from the center of the random void to the edge of the void. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06T17/00G01N23/046
CPCG06F30/25G06T17/00G01N23/046G01N2223/04G01N2223/401
Inventor 彭勇杨汉铎章秀芳
Owner ZHEJIANG UNIV
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