铁道科学与工程学报2017，Vol.14Issue(7)：1354-1360,7.
高速铁路空沟减隔振效果及影响因素数值分析
The numerical analysis of effect and influencing factor of vibration reduction by open trench on high-speed railway
摘要
Abstract
In order to study the effect and influencing factors of vibration reduction by open trench on high-speed railway, this paper took back soil of open trench as an analysis object to find out the vibration laws of back soil of open trench under different working conditions by numerical analysis. The average acceleration value of back soil of open trench was used to evaluate the effect and influencing factors of vibration reduction. The results show that the average acceleration value of back soil of open trench can be reduced by 30%~80%; the depth of open trench impacts clearly the effect of vibration reduction, but the growth rate of the effect of vibration reduction becomes slow down when the open trench is increased to a certain depth; the width of open trench has less effect on vibration reduction of its back soil, and is likely to increase the average acceleration value; under the same condition of train load amplitude, the effect of vibration reduction is enhanced with the increase of frequency, and the effect of vibration reduction becomes stable when the frenquency is increased to a certain extent.关键词
高速铁路/空沟/减隔振/数值分析/无限元边界Key words
high-speed railway/open trench/vibration reduction/numerical analysis/infinite element boundary分类
建筑与水利引用本文复制引用
张雷刚,刘晶磊,宋绪国,侯恩品,赵敏..高速铁路空沟减隔振效果及影响因素数值分析[J].铁道科学与工程学报,2017,14(7):1354-1360,7.基金项目
河北省青年拔尖人才计划资助项目(BJ2016018) （BJ2016018）
张家口市科技局科技计划资助项目(1511074B) （1511074B）
