Test And Analysis Of Vibration Propagation Caused By The Subway Train

With the development of modern industry and improvement of citizen living standard, the influences of vibrations caused by the subway train have already been concerned widely. The research on environment vibrations due to the train is very important. In this thesis, the on-site mesurement of vibration caused by the subway train in Shanghai is done, and then the analysis of the vibration is performed by FEM method.In this paper, the vibration of soil surface on Metro line 2 and that of tunnel structure on Metro line 1 are measured on site. Both time and frequency characters of the vibration are analyzed, and the regularities of vibration when the train is on the ground and undergroud are compared. Moreover, the regularity of wave propagation and frequency distribution are analyzed when the train is running upwards and downwards. Considering the requirements of vibration control, the influences of vibration on this field are estimated. With the load data calculated from the test result, the vibration caused by subway train is simulated, using the FEM software.Then the regularity of wave propagation is obtained and the influences of embbed depth on vibration are discussed. Finally, the main reason of the differences between calculation and mesurement is discussed, which could be refered later.