Dynamic Characteristics of Urban Rail Train in Multivehicle Marshaling under Traction Conditions

In recent years, urban rail transportation has rapidly developed in China and become one of the most important modes travel. Most existing studies on dynamic characteristics trains have been based single-section trains, there fewer marshaling that incorporate traction transmission systems. The performance each carriage directly affects operational reliability even running safety trains. For this reason, paper, a train model with system was established its accuracy validated by field tests. This dynamics enables consideration coupling interactions between gear motion, vertical, lateral longitudinal motions vehicle. First, Then, relationship motor torque time under conditions calculated. Finally, car studied. research results show is clear difference trailer, significantly inferior to trailer. Among four cars, performances first last moving cars were worse than those other cars. two trailers, trailer at back front. greater impact vertical vibration bogie frame wheelset, but body negligible. paper provides theoretical support for optimization operation safety.