측풍 영향 감소를 위한 방풍벽에 대한 수치 해석적 연구

Recently, the strong crosswinds have been raised a new issue because of the high speed and light weight of rail-vehicle. For one of the countermeasures on this issue, there is an installation of the wind fence around the railway of the strong wind area. Numerical analysis was used to understand the relation between the wind fence shape and induced aerodynamic force on a rail-vehicle. This paper presents the aerodynamic characteristics of the rail-vehicle under strong crosswinds for various wind fence shape: height of fence, upper shape, slot length between the ground and fence bottom. Through this study, it is found that the cross wind effect are greatly reduced by the increase of wind fence height. And the additional reduction can be obtained by the modification of the upper shape of the wind fence.