吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (3): 655-660.doi: 10.13229/j.cnki.jdxbgxb201403012

• 论文 • 上一篇    下一篇

沥青混凝土虚拟力学仿真模型自动生成及应用

李晓军,梁路路,谢诚伟,杨硕   

  1. 西安科技大学 地质与环境学院,西安 710054
  • 收稿日期:2012-11-19 出版日期:2014-03-01 发布日期:2014-03-01
  • 作者简介:李晓军(1971),男,副教授,博士.研究方向:道路工程材料力学性能仿真与测定.E-mail:lxjun@xust.edu.cn
  • 基金资助:
    教育部科学技术重点项目(210221);陕西省教育厅产业化培育项目(09JC11).

Auto-generation and application of virtual mechanical simulation model of asphalt concrete

LI Xiao-jun,LIANG Lu-lu,XIE Cheng-wei,YANG Shuo   

  1. School of Geology and Environment,Xi′an University of Science and Technology, Xi′an 710054,China
  • Received:2012-11-19 Online:2014-03-01 Published:2014-03-01

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摘要： 对沥青混凝土CT图片进行了数字处理,提取了99个不规则颗粒的二维边界。利用修正的快速Fourier积分法对不规则颗粒边界拟合后归一,建立了不规则颗粒形态数据库。利用不规则颗粒形态数据库和PFC2D软件编写了二维不规则颗粒沥青混凝土虚拟试件开发程序。最后以3种级配为例,在相同空隙条件下,开展了双轴贯入试验和劈裂试验的虚拟仿真,结果表明:利用所提出方法自动生成的数字试件可以较好地满足沥青混凝土微观力学性能数值分析的要求。

关键词: 道路工程, 沥青混凝土, 快速Fourier积分, 虚拟仿真, 有限元法

Abstract: Two-dimensional boundary coordinates of 99 irregular aggregates were extracted after digital processing of asphalt concrete CT images. The modified Fast Fourier Transformation method (FFT) was used to obtain the fitting functions of those coordinates and the irregular particle form database was established. With the established database and PFC2D software, a program for two-dimensional virtual mechanical simulation of asphalt concrete with irregular particles was written. Taking three gradations as an example, under the same void, virtual simulations of Double punch test and Split test were carried out. The test results show that the presented method can automatically generate digital specimen and the generated digital specimen can satisfy the requirements of micro mechanical properties numerical analysis of asphalt concrete.

Key words: road engineering, asphalt concrete, fast Fourier transformation (FFT), virtual simulation, finite element method (FEM)

中图分类号: 

  • U416
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