선로중심간격 결정을 위한 고속철도차량 3차원 비정상 교행해석

초록

The reduction of track center distance can save enormous cost and time for the new railway construction. However, it is also necessary to investigate the aerodynamic pressure load and vehicle stability of each train passing for safety and ride comfort. This paper mainly describes change of the induced side force of a high-speed train, while the train passes by each other. In order to obtain the side force history, 3D unsteady numerical analysis is conducted and the strong crosswind is considered for the severer windy weather condition. The induced side force is presented as repulsive and attractive force, changing suddenly and periodically. In a case of no-crosswind, the maximum attractive force and the maximum repulsive force is shown at the time when the train passes around the shoulder of the opposite train and when the trains located almost side by side respectively. In a case of crosswind, the transient side force increases as a mount of the force induced by the crosswind.