摘要
为了解决高速列车振动引起的岩质边坡动力响应问题,结合秦-沈客运专线路堑岩质边坡工程实例,建立了轨道-路基-岩质边坡系统动力有限元模型;采用编制的动力分析程序,对不同列车运行速度下路堑岩质边坡的动力响应进行了数值计算,取得了高速列车振动荷载作用下路堑岩质边坡动力响应的分布规律。结果表明,动力响应主要发生在列车振动源周围5 m范围之内,最大值发生在边坡底部;随着列车运行速度的增大,边坡底部动力响应的增幅最大,且各响应中振动加速度的增幅最大。
In order to solve the dynamic response problem of rock slope induced by the vibration load of high speed train. Based on cutting rock slope engineering case of Qin-Shen Special Railway, the dynamic finite element model of tracksubgrade-cutting slope system is established. By using dynamic analysis program, dynamic response of cutting rock slope caused by train vibration loads under different train-speed is caculated, and the distribution of dynamic response under vibration load of high speed train is obtained. The results indicate that dynamic response is happened within 5 m around train vibration source, and the maximum is happened at the slope bottom. With the increase train-speed off, the dynamic response amplification at the slope bottom is maximum, and the amplification of vibration acceleration in all dynamic resDonses is maximum.
出处
《振动工程学报》
EI
CSCD
北大核心
2008年第4期354-358,共5页
Journal of Vibration Engineering
关键词
轨道-路基-岩质边坡
高速列车振动
有限元模型
动力响应
track-subgrade-cutting slope
high speed train vibration
finite element model
dynamic response
