Simulation analysis of the sliding plug door lower-swing arm of urban rail transit trains
The sliding plug door is the mainstream type in the door system of urban rail transit trains.Most sliding plug doors have a lower-swing arm structure,which plays a crucial role in the smooth movement and good sealing performance of the door.At present,the maintenance of the structure by the operating unit has largely been focused on dimensional measurement and functional inspection,while the research on the status of the lower swinging arm is less common,and there have been many cases in the industry in which the roller of the lower swinging arm fell to the track area due to the lack of maintenance on the status of the lower swinging arm,so it is of great significance to carry out the simulation and analysis on the status of the lower swinging arm.In this article,we compare and analyze the swing arm of 2 different structures with respect to the main line force tolerance and sealing mode of the sliding plug door system,and establish the finite element model of solid mechanics and stress life based on the geometric characteristics.The simulation results show that the service life of the lower swing arm assembly with anti-detachment pin structure is about 2.78 times of that of the structure without anti-detachment pin under the same force.The following improvement measures are thus proposed.For trains with low passenger flow,the lower swing arm assembly can be replaced only during overhaul,while for the lower swing arm in bad condition,the lower swing arm roller assembly can be replaced individually within half of the bogie repair cycle to ensure the safety and reliability of train operation.
urban rail transit trainssliding plug doorlower swing arm assemblyfinite element simulationstress life
NETL
NSTL
万方数据
