铁道标准设计Issue(12)：23-26,27,5.
地铁隧道列车运行诱发环境二次振动初探
Preliminary Study on Secondary Ambient Vibration Induced by Train’s Running in Tunnel
摘要
Abstract
The dynamic coupling model of train-track-tunnel was established, and the dynamic excitation of tunnel’s load-carrying structure in the process of train’s running was acquired by inputting the actual parameters of the train, the track and the tunnel’s load-carrying structure. On this basis of the above, by comprehensively using the finite element method and the infinite boundary element method, the dynamic coupling model of tunnel-soil-buildings was established. Afterwards, the characteristics of the vibration responses of both the ambient soils around the tunnel and the buildings along the tunnel were analyzed, so as to analyze the influence of the metro train’s vibration on the ambient. The results show that: the secondary ambient vibrations induced by metro train’s running generally belong to low-frequency vibrations, which mainly consist of the vertical vibrations and transverse vibrations. When the train passes through, the maximum vertical vibration on the ground will appear at the place of 10 meters away from the tunnel centerline;and except for the rebound phenomena appeared at the point of 45 meters away from the tunnel centerline, the amplitude values of the vertical vibration acceleration at other points basically decrease gradually with the increase of the distance. In addition, with the increase of the propagation distance, the amplitude values of higher-frequency vibration will attenuate relatively rapidly.关键词
地铁/隧道/环境振动/有限单元法/无限边界元法Key words
metro/tunnel/ambient vibration/finite element method/infinite boundary element method分类
交通工程引用本文复制引用
罗伟,陈嵘,颜乐,王宇..地铁隧道列车运行诱发环境二次振动初探[J].铁道标准设计,2013,(12):23-26,27,5.基金项目
国家自然科学基金高铁联合基金项目(U1234201)。 （U1234201）
