Abstract：In order to study the influence of F-rail in vertical coupling vibration of low-medium speed maglev train-bridge system, two coupling vibration models, in which one considered the F-rail and the other did not, were built respectively using the joint simulations of SIMPACK and ANSYS for a 20m prestressed concrete (PC) simply-supported girder in one low-medium speed maglev test line, considering the PID active control based on the feedback of displacement-velocity-acceleration. Then, the field dynamic test was carried out, and simulation results of the two models were compared and verified based on the field test data in time-domain and frequency-domain, respectively, with special emphasis on the vertical coupling vibration responses. Analysis results show that: when considering the F-rail, the simulation results are closer to the experimental results| the local vibration of F-rail is intensive within the range of 50~65Hz| when considering the F-rail, the simulation and measured values of vertical acceleration of bridge have peaks within the frequency range (50~65Hz), and without considering the F-rail, the peaks do not appear| the local deformation of F-rail is relatively remarkable, which resemble the shortwave irregularity, leading to the larger fluctuation of magnetic levitation gap and magnetic levitation force and the greater dynamic displacement and acceleration of train| increasing the vertical stiffness of F-rail may reduce the vertical dynamic responses of bridge and carriage.
李小珍 王党雄 耿杰 张迅 刘德军. F轨对中低速磁浮列车-桥梁系统竖向耦合振动的影响研究[J]. 土木工程学报, 2017, 50(4): 97-106.
Li Xiaozhen Wang Dangxiong Geng Jie Zhang Xun Liu Dejun. Study on the influence of F-rail in vertical coupling vibration of low-medium speed maglev train-bridge system. 土木工程学报, 2017, 50(4): 97-106.
