고속선 터널내 궤도 형식에 따른 궤도 구성품의 진동 특성에 관한 연구

In this paper, an experimental study is carried out to analyze the vibration characteristics of components of the ballast track and the slab track layed in HSL tunnels. According to vibration level test of ballast tracks and concrete tracks on HSL, the vertical vibration level of rails on concrete tracks is 6.2㏈ more than that on ballast tracks, and especially on 50~80㎐ frequency band, the difference is more than 6㏈. The orther track components according to track type are appeared to be smaller on the slab track than on the ballast track. Regarding car body vibration, 80㎐ component, which was not remarkable while running on open tracks, is considerably amplified in tunnels where concrete tracks are laid.