Study On Structural Vibration Induced By High-speed Train And Vibration Mitigation Methods

With the rapid development of high-speed railway and the increasing demands of urban living environment in our country,there is a growing concern about structure vibration problems caused by high-speed trains.In this dissertation,based on the research of scholars at home and abroad,numerical simulations are adopted to establish the tracksoil-station-building three-dimensional finite element model,in order to solve the vibration problems of buildings beside the high-speed rail station.Besides,the vibration characteristics of high-speed railway stations and buildings are investigated,and the damping effects of different vibration reduction measures are analyzed.The specific research work is as follows:(1)According to the vehicle-track coupling dynamics theory,the vehicle-track coupling dynamics model is established in order to obtain the excitation force of trains under different speed,which is later used to be the excitation load in the orbit-soil-stationbuilding three-dimensional FE model.(2)A track-soil-station-building three-dimensional FE model is established with the software ABAQUS.On the basis of the transient dynamic analysis method,the vibration response characteristics of high-speed stations and buildings are analyzed,and the influence of different velocities and soil qualities on building vibrations are investigated.(3)The effects of base plate thickness of high-speed stations on vibration propagation and foundation vibrations are studied.And vibration reduction effects of local isolation measures on vertical vibration of buildings are analyzed.