Door Howling Cause Analysis and Countermeasures of Urban Rail Transit Train Passing through Tunnels

Abstract

Objective When the urban rail transit train with designed speed of 120 km/h passes through a tunnel at high speed, rear door howling problem of the tail car often occurs, seriously affecting passenger ride comfort. Thus the cause of this problem is studied in depth, and countermeasures are proposed. Method Taking the trains with serious howling in Zhengzhou-Xuchang City Railway as the research project, the causes of train door howling problem are analyzed from the aspects of door howling mechanism, vehicle internal and external pressure difference, and problems with the door itself. Aiming at the cause of door howling, targeted optimization measures are formulated from aspects of the blocking ratio between train and tunnel, the structure of door sealing rubber strip, and the compression amount of sealing rubber strip and so on. Stamping test is carried out by mounting doors with/without optimization on the same air-tight test bench. Result & Conclusion Door stamping test shows that under the same air intake volume, the maximum vehicle interior pressure increases from 1 400 Pa to 2 200 Pa after door optimization, and the door sealing performance is improved significantly, completely solving the problem of door howling.

Keywords

• urban rail transit
• tunnel
• train
• door howling