Study On Dynamic Response Of Linear Induction Motor Train-Bridge System And Vehicle Runability

More and more attentions are paid to the Linear Induction Motor (LIM) rail transit system for its distinguishing features that tradition adhesion systems can not achieve. The study on the dynamic response of the LIM vehicle-bridge system has great theory value and engineering significance for insuring the running safety of LIM trains and structure safety of bridges, and promoting the development of this system in cities.The work principle, the merits, the sorts and the development at home and abroad of the LIM rail transit system are introduced and the basic research methods on dynamic response of the vehicle-bridge system are intuoduced in this paper. Based on the analysis of the electromagnetic force generated between the vehicle motor installed on the vehicle and the reaction plate on the bridge, an analysis model of the dynamic interaction in LIM vehicles-bridge system is established and a computer code for simulation analysis is compiled by adopting the FORTRAN technology. And then, by taking the viaduct of the Guangzhou Rail Transit No.4 as engineering background, the dynamic responses of the LIM vehicles passing through the bridge are analyzed. The dynamic responses traits of the LIM vehicle-bridge system with different bridge structures and load behaviors are discussed. The running safety and passenger comfort of the LIM vehicles on the bridge are evaluated.The analysis results show that the LIM vehicles—bridge system with different working conditions has excellent dynamic performances, the running safety of LIM trains and structure safety of bridges are ensured. The LIM rail transit system is an ideal urban rail transit system and will have a great future.