| As a new kind of rail transit,maglev has lower noise,better climbing ability,smaller turning radius and lower pollution.With the development of economy and society,the design speed of maglev train continues to increase,and there is bound to be a demand for high-speed maglev.High-speed maglev has the advantages of faster speed,more punctual,safer,more comfortable and more convenient,It can compete and complement with the traditional wheel rail high-speed railway and even the aviation industry.Under this background,this paper discusses the dynamic response of high-speed maglev train elevated station building coupling vibration model under different passing conditions and starting and braking conditions.The main work and conclusions are as follows:(1)Based on the mid low speed maglev theory and the element model of station provided by Shanghai high-speed maglev train and Design Institute,the theoretical models of highspeed maglev train,elevated station building and active suspension control system are established respectively to form the coupling vibration model of high-speed maglev train and elevated station building;(2)The effects of vehicle speed,temperature deformation and the parameters of main components of the station building on the dynamic response of the high-speed maglev train elevated station building coupling system are discussed.The results tell that the system’s dynamic responses increase with the vehicl;When the temperature deformation increases,dynamic responses of the maglev train and suspension control system also increase;The temperature deformation has little influence on the dynamic response of the station building structure,but it will significantly affect the dynamic response value of high-speed maglev vehicle and suspension control system.The temperature deformation limit should not be greater than L/8000,so as to ensure the safe and stable operation of high-speed maglev train;On the basis of the original longitudinal beam height,appropriately reduce the longitudinal beam height,and the increase of each dynamic response of the system is not significant.On the basis of the original floor thickness,appropriately increase the floor thickness,and significantly reduce the vibration in the platform area and rail area.Both of them can save materials and reduce the project cost;(3)The influence of the train on the dynamic response of the high-speed maglev train elevated station building coupling system under the three working conditions of single line low-speed operation,double line in the same direction and opposite direction low-speed operation is analyzed.The results show that the vertical dynamic displacement of the system under the single line low-speed operation is slightly smaller than that under the high-speed operation,and smaller than that under the double line low-speed operation;Under the influence of low speed,the dynamic impact effect is small,and the vertical acceleration of the system under the three low-speed operating conditions is far less than that under the highspeed passing condition;For the vertical vibration in the canopy area and rail area of the elevated station building,the low-speed operation of the single line is less than that of the double line in the opposite direction and less than that of the double line in the same direction.For the vertical vibration in the platform area,the low-speed operation of the single line is less than that of the double line in the same direction and less than that of the double line in the opposite direction. |
