고속철도차량 개활지 주행 시 공기역학적 불확실성을 고려한 팬터그래프의 접촉력 안정성 분석

다국어 초록 (Multilingual Abstract)

The stability of pantograph concerning the contact force was investigated with considering aerodynamic uncertainties of the flow during the high speed train’s running in open field. For this, three dimensional flow around the train was calculated in open field. It was convinced that the growth of the boundary layer reduced the velocity of the inflow (V<SUB>i</SUB>) to the pantograph pan head to 92% of the train’s speed. Then, the standard deviation of contact force (σ) was calculated with changing the angle of attack (AOA) and V<SUB>i</SUB>. From the simulation results with taking account of boundary layer effect, the response surface model (RSM) was constructed. Then Monte Carlo Simulation (MCS) was applied to investigate the effect of uncertainties of AOA and V<SUB>i</SUB>. As a result, statistical evaluation of the stability of became possible with the uncertainties of the AOA and V<SUB>i</SUB> and the probability of violating the stability condition of was greatly reduced when the boundary layer effect was considered.