基于分形理论的粗粒料级配缩尺方法研究

发布时间：2018-03-27 14:58

本文选题：分形理论　切入点：分形维数　出处：《岩土力学》2016年12期

【摘要】：按规范要求的剔除法、等量替代法、相似级配法、混合法等4种缩尺方法,对某粗粒料原型级配进行缩尺,得到15条试验模拟级配,相应的最大颗粒粒径分别为60、40、20 mm。对原型级配和缩尺后模拟级配,进行了最大干密度试验,引入粒径分形维数,研究粒径分形维数与级配缩尺方法、最大干密度的变化规律。分析认为,粒径分形维数是一个能综合反映级配的量化评价指标,可准确反映不同缩尺方法后的试验模拟级配;级配缩尺方法本身对最大干密度有较大的影响,相似级配法的最大干密度值与原型级配的最接近,等量替代法的差异性最大;粒径分形维数与最大干密度具有较好的线性归一化,利用归一化规律,可准确推求原型级配的最大干密度值,有较好的工程应用价值。
[Abstract]:According to the requirements of the elimination method, equivalent method, similar grading method, the hybrid method of the 4 scale method, for the scale of the coarse-grained material prototype gradation, get 15 simulated gradation, the corresponding maximum particle diameters of 60,40,20 mm. on the simulation level with original gradation and scale, the maximum dry density the introduction of particle size test, fractal dimension, fractal dimension and particle size grading scale method, maximum dry density change. The analysis shows that the fractal dimension is a quantitative evaluation index can reflect the gradation, the test can accurately reflect the different scaling methods after simulated gradation; grading scale method itself has great influence the maximum dry density, similar grading method of maximum dry density value and original gradation to the difference of the maximum equivalent substitution method; particle size fractal dimension and maximum dry density with good linear normalization, By using the normalization law, the maximum dry density value of the prototype gradation can be calculated accurately, and it has good engineering application value.

【作者单位】：长江科学院水利部岩土力学与工程重点实验室;
【基金】：国家自然科学基金(No.51379021) 国家自然科学青年基金(No.51309024) 长江科学院基本科研业务费(No.CKSF2014055/YT)~~
【分类号】：TV41

【相似文献】