Research on Attenuation Characteristics of Subway Vibration

Abstract:

At first， a finite element model of metro tunnelsoil is built.The attenuation characteristics of the vibration velocity and acceleration within 170 meters away from tunnel center are analysed.Based on the wheelrail dynamic coupling analysis,the dynamic force loaded on the track bed by different subway tracks is gained which is used in the finite element model.The vibration propagation characteristics on the earth’s surface around the different tracks are calculated and analysed.The results show that within 50 meters,vibration reduction effect of floating slab track is obvious; out of 50 meters,track type has little influence on the vibration.