Experiment and Simulation Research on Vibration of Rubber-Tire Suspended Train and Steel Bridge
Field experiments and simulation analyses were conducted on a Kaifeng-suspended mono-rail demonstration line to evaluate the service performance of rubber-tire suspended vehicles and steel guideway bridges and provide appropriate criteria and operating and design parameters for this type of vehicle-bridge system.A rubber-tire suspended train-steel and guideway bridge coupling analysis program was developed.The vehicle-bridge coupling model was built according to the measured parameters,including the stiffness and damping of the pneumatic spring and travel wheels.The calculated and measured dynamic responses of the vehicle and bridge were compared.The dynamic performance of the vehicle-bridge structure was evaluated based on the calculations and related specifications.The results show that 1)it is feasible to use the vehicle-bridge coupling simulation method to investigate the structural vibration performance of a suspended mono-rail system;the simulation results were consistent with field measurement results;2)the ratio of the vertical deflection to the span of the steel guideway girder was less than the limit given in the specifications and the vertical stifness of the structure was reasonable;3)the maximum vertical and lateral rotation angles between two adjacent beams at the beam-ends were 4.5‰ and 1.5‰,respectively;4)the maximum dynamic factors of longitudinal and lateral stress of the steel guideway beam were 1.17 and 1.14,respectively,at a vehicle speed of 80 km/h;5)the unloading factor of the wheel and lateral acceleration of the guideway bridge were larger than those of conventional railway systems;the limits of these two indices could be set higher than in the current railway specifications as the suspended trains were unlikely to derail.
万方数据
维普
