가속도계를 이용한 한국형 고속전철차량 시운전 시험 동특성 분석 연구

초록

Korean High Speed Train (KHST) designed to operate at 350km/h has been tested on high speed line in JungBu site since it was developed in 2002. The data acquisition system based on accelerometers was used to prove the dynamic performance of KHST. Up to now, there are the efforts to know the system vibration mode with theoretical method. But the theoretical results are too reliable to apply to real design problem. Therefore, in this paper, the efficient experimental method of vibration analysis for rail vehicle system is proposed by appling to KHST to analysis the vibration mode characteristics. Also, the two cases vibration occurred during on-line tests is illustrated spacially in this paper. The first case is that the variation of vertical acceleration of wheel is analyzed when an abrasion occur on wheel. The second case is that the lateral acceleration of wheel, bogie and body are analyzed when the KHST is unstable at high speed. The occurrences of these special phenomena were due to the some faults of the suspension and braking systems, and now the faults are improved.