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开级配沥青碎石随机凸多边形集料模型

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Keywords: 道路工程,开级配沥青碎石,细观结构,仿真,孔隙

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Abstract:

为进行开级配沥青碎石细观力学分析,研究了开级配沥青碎石随机凸多边形集料模型生成方法。为使模型更加逼真,生成过程更加高效,考虑孔隙的模拟,用面积控制集料颗粒的投放,利用蒙特卡罗方法生成二维随机圆形集料模型,引入一系列预判条件改进延凸公式和基块体的生成方法,改进侵入和相交判断方法,并给出2块体相交判断方法,通过延凸,生成二维随机凸多边形集料模型,并通过过程控制使模型的生成符合实际沥青碎石试件的制备过程。模型生成实例表明,本模型生成方法效率较高,较符合真实沥青碎石试件;基于本模型的数值单轴试验结果较符合实际,证明本模型是有效的。

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