텐션클램프의 체결에 따른 거동 및 초기응력상태 분석

초록

Rail fastening system, which provides a structural connection between rail and sleepers, is a main track component that plays an important role for retaining the rail gauge within acceptable tolerances as well as for passing the train load to the roadbed through sleepers. Because rail fastening system may be vulnerable to fatigue due to the repeated train load, it is essential to evaluate the structural behavior and fatigue performance of the components. In this paper, the fatigue performance of the tension clamp SKL15, where the fatigue damage has recently been reported, was compared with that of SKLB15 which replaced the damaged SKL15. The initial stress state as a factor affecting the fatigue performance of SKL15 and SKLB15 was evaluated both experimentally and numerically. The structural behavior and stress variation of tension clamps during the clamping torque were measured by experiment, and the global response and local stress distribution of tension clamp were also evaluated by finite element analysis.