Monitoring and Analysis of Dynamic Behaviour of High-Speed Trains in Long-Term Service using an Unattended Test System

摘要

Dynamic behaviour and its evolution are concerns for those operating high-speed trains. In this paper, a cloud server is applied to establish a connectionbetween the vehicle-mounted equipment and users to decrease the influence of network instability. To ensure the accuracy and consistency of datatransmission, MQTT (Message Queue Telemetry Transport) protocol is used to transfer data measured from the vehicle. The paper discovers the vibrationtransfer characteristic and the evolution of the dynamic behaviour of several types of high-speed trains, along with wheel wear under several operationconditions, over time. The turbulence caused by high-order wheel polygonalization formed during long-term service, which cannot be weakened by thesuspended system sufficiently, is harmful to the ride quality of high-speed trains. The results confirm the operational reliability of the high-speed trains inChina and provide useful references for the optimisation and maintenance of high-speed trains.