摘要
利用LUSAS有限元计算程序对动载荷下铁路整体结构的本征值进行了分析,得出结构的固有振动频率和时程曲线。参照本征值的分析结果,结合某铁路干线土质边坡的工程实例,利用有限差分的数值分析方法,对列车动载荷下,对周围土质边坡的扰动情况进行了分析。结果表明,作用于坡底的铁路载荷对边坡的扰动区域集中在轨道中心3m以内,随着动载时间的增加,扰动区域会逐渐扩大。
The eigenvalue of railway system was analyzed by using LUSAS FEA. According to the analysis results, the eigen- frequency and the response of vertical displacement as well as the principle stress versus dynamic loading time were found. With an in-situ engineering case, a numerical model of soil masses slope under the railway dynamic loading was built. The results show that the disturbing is within 3 m from rail. With time going, the disturbing scope will be expanded.
出处
《交通运输工程学报》
EI
CSCD
2004年第1期38-42,共5页
Journal of Traffic and Transportation Engineering
基金
山东省科技攻关项目(321008)
关键词
铁道工程
动载荷
土质边坡
扰动
数值分析
Dynamic loads
Eigenvalues and eigenfunctions
Mathematical models
Numerical analysis
Soil structure interactions
Stress analysis
