SIMULATION STUDY OF VEHICLE-BRIDGE COUPLING VIBRATION FOR SUSPENDED MONORAIL TRANSIT SYSTEM

Suspended monorail transit system is a form of urban monorial tansit, in which the vehicle travels along the rail through the bogie frames above meanwhile the vehicle body is suspended under the track beam. Within the next few years, suspended monorail transit system will show vast potential for future development with the advantages of low cost and short construction cycle. Currently, the suspended monorail has not been studied systematically in China, and there is a lack of relevant information. Based on the method of vehicle-bridge coupling vibration theory, the vehicle and bridge is taken as an interaction and coordination system. The general FEM software ANSYS and multi-body dynamics software SIMPACK are adopted respectively to establish the finite element model for bridge and the multi-body vehicle mode, and the co-simulation method is adopted to correlate ANSYS and SIMPACK to investigate the vehicle-bridge coupling vibration. The main procedures are follows: (1) The coupling dynamic effects of suspended monorail transit system between vehicle and bridge is significantly. It is feasible and necessarily to study the impact effction of suspended monorail transit system based on the method of the coupled vehicle-bridge vibration. (2) The bridge structure of suspended monorail transit sysrem has a larger acceleration, the traditional railway bridge evaluation criteria is no longer appropriate, and some effectively measures must be adopted to restrain the vibration. (3) Comparing to short train formation, the dynamic responses of bridge is signigicantly increase in the longer train formation operating condition.