Evaluation of Running Safety of the Commuting Vehicle in Incheon International Airport Railway

초록

The main measure to assess the running safety of railway vehicle is the force between wheel and rail because derailment is the main factor to block the running safety and lead to a heavy accident. In particular, the estimation and assessment of curving performance and running safety of the running vehi-cle, which is newly developed and manufactured, are the essential processes to secure safety. Moreover, the assessment of derailment coefficient is the most crucial to guarantee the running safety. In addition, as the wheel load is increasing when the railroad is running, rail or cross tie composing a track may be damaged or broken or cause drastic twisting, the force between wheel and rail should be checked for maintenance and repair as well as the running safety. In this paper, the results of running safety assess-ment are described for the Incheon International Airport Railroad that was newly manufactured for opera-tion. For this study, we manufactured revolution body load sets, by attaching strain gauge to the wheel set in order to measure the force arising between wheel and rail. The main line test up to 120 km/h of running speed shows that the derailment coefficient does never exceed 0.8 at any rate. Within the tolerable level, Incheon International Airport Railroad was proved very safe in terms of wheel unloading ratio and lateral force.