| Title |
The Fatigue Life Evaluation of Rail on the Concrete Track of High Speed Railway by Analysis of the Vehicle/Track Interaction |
| Authors |
임형준(Lim, Hyoung-Jun) ; 성덕룡(Sung, Deok-Yong) ; 박용걸(Park, Yong-Gul) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.6D.663 |
| Keywords |
차량/궤도 상호작용해석;콘크리트궤도;레일휨응력;중회귀분석;피로수명 vehicle/track interaction analysis;concrete track;bending stress at rail bottom;multiple regression analysis;fatigue life |
| Abstract |
The demand of CWR is rapidly increasing because of the adaptation of concrete track, the need for rapid and comfortable ride, and the reduction of maintenance cost. Because of short applying period of the concrete track, there is not a case of CWR fracture in Korea caused by repeated load of the train, which makes it difficult to calculate replacement period of rail based on rail fatigue life using an actual field data. This study thus inspected the bending stress at rail bottom through analyzing the vehicle/track interaction, performed multiple regression analysis on the data, deducted the bending stress prediction equations by the speed and the surface irregularity. Finally, the fatigue life of CWR on the concrete track was predicted based on the prediction equations for bending stress at rail bottom. |