Dynamic Responses and Riding Comfort Analysis of the Passenger-Train-Bridge System in Urban Rail Transit.

In order to study the riding comfort of the passengers on the urban rail transit train, a coupling vibration model for the passenger-train-bridge system is proposed and corresponding calculation programs are prepared. Taking a steel-concrete composite girder bridge on Beijing Metro Line 5 as an example, the dynamic responses of passengers and trains are simulated, and the differences of the dynamic responses between passengers and trains are analyzed. The dynamic response of passengers when the train running on the bridge line and the ordinary subgrade line is calculated respectively, and the influence of bridge vibration on passenger vibration is analyzed. By setting different working conditions, the variation of passengers' vibration is analyzed. Taking the dynamic response of passengers as the evaluation index, the riding comfort of passengers is evaluated by ISO - 2631 standard. The results show that the bridge's vibration will definitely increase the passenger's dynamic response, passengers in the middle carriages of the train have better riding comfort feeling than those in the head and tail ones; while in the same carriage, passengers on the middle seats feel better than those on both end seats; and with the increase of the train speed, the riding comfort of passengers will gradually reduce. [ABSTRACT FROM AUTHOR]