Abstract：Double subgrade is one of widely used types of high-speed railway subgrade, study for dynamic stress of subgrade is very important. In this paper, 3D finite element model of vehicle-track-double subgrade is bulit by ABAQUS, with two typical track irregularity spectrums added on the two rails. According to the numerical calculating results, the distributions of dynamic stress of subgrade along longitudinal direction were obtained under two typical track spectrums and three train speeds. The mean values and the coefficient of variations(COVs) of dynamic stress under different depths of subgrade were obtained, and the fitting formulas were given for the mean values. By Kolmogorov rule, it can be verified that dynamic stress of subgrade along longitudinal direction is approximate to log-normal distribution under track irregularity spectrums.
张石友1，孙海建1，陈艳国2. 高速铁路双线路基动应力的特性研究[J]. 振动与冲击, 2016, 35(17): 165-170.
ZHANG Shi-you1, SUN Hai-jian1,CHEN Yan-guo2. Study for dynamic stress of high-speed railway double subgrade. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(17): 165-170.
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