Prediction of vibrations from underground trains on Beijing metro line 15  

作　　者：丁德云 刘维宁 GUPTA S LOMBAERT G DEGRANDE G 

机构地区：[1]School of Civil Engineering,Beijing Jiaotong University [2]Department of Civil Engineering,K.U.Leuven [3]Beijing Urban Engineering Design and Research Institute Co.,Ltd

出　　处：《Journal of Central South University》2010年第5期1109-1118,共10页中南大学学报（英文版）

基　　金：Projects(50538010,50848046) supported by the National Natural Science Foundation of China;Project(BIL07/07) supported by the Research Council of K.U.Leuven and the National Natural Science Foundation of China

摘　　要：The impact of vibrations due to underground trains on Beijing metro line 15 on sensitive equipment in the Institute of Microelectronics of Tsinghua University was discussed to propose a viable solution to mitigate the vibrations.Using the state-of-the-art three-dimensional coupled periodic finite element-boundary element(FE-BE) method,the dynamic track-tunnel-soil interaction model for metro line 15 was used to predict vibrations in the free field at a train speed of 80 km/h.Three types of tracks(direct fixation fasteners,floating slab track and floating ladder track) on the Beijing metro network were considered in the model. For each track,the acceleration response in the free field was obtained.The numerical results show that the influence of vibrations from underground trains on sensitive equipment depends on the track types.At frequencies above 10 Hz,the floating slab track with a natural frequency of 7 Hz can be effective to attenuate the vibrations.The impact of vibrations due to underground trains on Beijing metro line 15 on sensitive equipment in the Institute of Microelectronics of Tsinghua University was discussed to propose a viable solution to mitigate the vibrations. Using the state-of-the-art three-dimensional coupled periodic finite element-boundary element （FE-BE） method, the dynamic track-tunnel-soil interaction model for metro line 15 was used to predict vibrations in the free field at a train speed of 80 km/h. Three types of tracks （direct fixation fasteners, floating slab track and floating ladder track） on the Beijing metro network were considered in the model. For each track, the acceleration response in the free field was obtained. The numerical results show that the influence of vibrations from underground trains on sensitive equipment depends on the track types. At frequencies above 10 Hz, the floating slab track with a natural frequency of 7 Hz can be effective to attenuate the vibrations.

关 键 词：vibration prediction underground trains coupled periodic FE-BE method track types 

分 类 号：U231[交通运输工程—道路与铁道工程] U211.3