선로의 형상에 따른 철도차량의 탈선계수 변화에 관한 연구

The derailment coefficient refers to the ratio of horizontal force(Lateral force) to vertical force (Wheel load), and if the value exceeds a certain level, a wheel climbs or jumps over the rail. That's why the value is used as a criterion for running safety. Derailment coefficient of rolling stocks alters according to shape of rail track. I measured three-dimensional angular velocity and acceleration to use 3D Motion Tracker. Test result, derailment coefficient of rolling stocks and shape of rail track examined closely that have fixed relation. Specially, was proved that Roll Motion has the close coupling relation.